St. Louis RPM New Announcement’s
We are happy to add to our growing lineup of locomotive lighting with the addition of the Mars lineup of lights! We did extensive research on this line, in order to make the best replicas we could of these popular lights. This initial release will cover all of the common versions. We may add some of the more one off/steam-era lights down the road. All lights come in 2-packs, include clear lenses and are designed to work with 0402 LED’s.
Mars SBB1-101: Used extensively by the Southern Pacific as part of their 5-light package, the Mars style single oscillating light was prudently a red UDE light, however some short lines used them as clear warning lights. https://gothamrailmarine.com/product/mars-sbb1-101-undesired-emergency-light-ude/
Mars SB-2-200 Case Mount : Can be modeled as the SBW-2-200 (dual white lens) or SBWR-2-200 (white/red lens). This is the older style Mars light, which was used on some steam power, as well as first generation diesels. This has a solid cast aluminum case, with a figure 8 shape to hold the lenses in position. https://gothamrailmarine.com/product/mars-sb-2-200-case-mount/
Mars SB-2-300 Case Mount: Can be modeled as the SBW-2-300 (dual white lens) or SBWR-2-300 (white/red lens). This light replaced the SB-2-200 style and was common on 1st generation engines. The cover was now a thinner, hinged piece, and the lenses were gasket mounted. https://gothamrailmarine.com/product/mars-sb-2-300-case-mount/
Mars SB-2-301 Flange Mount: Can be modeled as the SBW-2-301 (dual white lens) or SBWR-2-301 (white/red lens. This is the same light as the SB-2-300; however, it is a recessed mount with a bolted flange. This style was utilized on early 2nd generation engines. https://gothamrailmarine.com/product/mars-sb-2-301-flange-mount/
Mars SB-2-301 Flange Mount w/Visors: Same as above but with visors/glare shields. https://gothamrailmarine.com/product/mars-sb-2-301-flange-mount-w-visors/
Mars SB-9000 Dual Beam headlight w/Glass Lens: The Mars twin beam headlight is unique, as the bulbs sit behind a single piece of glass. We updated this part to use 0402 LED’s, as well as now featuring an updated lens design. https://gothamrailmarine.com/product/mars-twin-beam-headlight-w-glass-lens-2/
CSX Extended Ditch Lights/MU Stands: Includes 3 Pyle style ditch lights/MU stand with correct notched ends to fit over handrail stations. Includes one left, one right as well as one left stand with a blanked MU plug. Setup for 0201 LED’s (not included). Includes clear lenses and mounting wire. https://gothamrailmarine.com/product/csx-extended-ditch-lights-mu-stands/
Southern/Norfolk Southern Walkway Light Set: Based on the common ground light housing, we are offering a set of 5 styles of Southern walkway light. Includes 3 of each basic bracket style, and 3 of each conduit style in left and right mounts. These can be lit using 0201 LED’s (not included). https://gothamrailmarine.com/product/southern-norfolk-southern-walkway-light-set/
EMD GP7 Coupler Buffer Plate: Specific to the EMD GP7, this buffer plate is a cast style, with a weld bead detail around the edge. This is just the detail for the pilot – the stock coupler boxes are still used, just trimmed down. This coupler plate is wide enough that a standard KD shank will fit through. Includes 1 pair.
https://gothamrailmarine.com/product/emd-gp7-coupler-buffer-plate/
EMD GP18/20/30/35 Coupler Buffer Plate: Introduced on the GP18, this is a narrower, fabricated style coupler buffer plate. This style ran through early GP35 production. Note: This plate will require modified coupler shanks, or narrow shank Sergent couplers. Includes 1 pair. https://gothamrailmarine.com/product/emd-gp18-20-30-35-coupler-buffer-plate/
Alco Roof Vents: Used extensively on RS1, 2 and 3’s as an air intake vent on the short hood. Also used on some later RS11’s and other Alco’s. 5 per package. https://gothamrailmarine.com/product/alco-roof-vents/
NYC Location Lights: While we based these on a NYC drawing, location lights were used by a number of railroads including NYC, EL, Southern, IHB and others as a way for yardmasters to see where the yard engines were working. Set includes 6 lights. https://gothamrailmarine.com/product/nyc-location-lights/
Q-Tron Wheel Slip Monitor: Used on a lot of Dash-3 style rebuilds and later power, the Q-Tron generator uses a tapered housing, with an attached bracket for the cable. Includes 4 monitors and cable material.
Quantum Speedometer Generator: Like the Q-Tron, the Quantum style axle generator was predominantly used for late style electronic speedometers. Includes 4 generators. https://gothamrailmarine.com/product/quantum-speedometer-generator/
EMD Roots Blowers: Used for scavenging on EMD’s 567, 567A/B/C/D engines as well as 645E engines. Includes full drive end detail (with left or right shafts), as well as the lobes inside the case! Includes 2 pairs. https://gothamrailmarine.com/product/emd-roots-blowers/
Leslie Tyfon A-125: A common horn on early switchers, Passenger engines, etc. Commonly paired with an A-200. 2 per pack. https://gothamrailmarine.com/product/leslie-tyfon-a-125-2/
Leslie Supertyfon Split Manifold S-3L – Early: Another horn common on early passenger power. Combines an S-25 horn as well an an S-2M horn to make the combined S-3L. This is the early version with tab back power chambers and 2-piece bells. 2 per pack (2x S-25 & 2x S-2M). https://gothamrailmarine.com/product/leslie-supertyfon-split-manifold-s-3l-early/
Leslie Supertyfon Split Manifold S-3L – Late: An S-25 horn as well as an S-2M horn to make the combined S-3L. These were used on a number of early EMD hood units. This is the late version with dome back S power chambers. 2 per pack (2x S-25 & 2x S-2M). https://gothamrailmarine.com/product/leslie-supertyfon-split-manifold-s-3l-late/
Nathan Airchime K5LAR24: Using the low-profile manifold, this is a common K5LA with the #2 and #4 bells reversed on the right side. Includes 2 per pack. https://gothamrailmarine.com/product/nathan-airchime-k5lar24/
Nathan Airchime P1R2 (P2): Used extensively by the Lehigh Valley, this horn uses the gull wing manifold, with the upper 3 ports blocked off and the #2 bell reversed on the left. 2 per pack. https://gothamrailmarine.com/product/nathan-airchime-p1r2-p2/
Nathan Airchime P24R1: Another non-common P horn bell arrangement used the gull wing manifold, with the #1 bell reversed in the center. This was used by the Northern Pacific, with them lasting well into BN and Amtrak as well on F units. 2 per pack. https://gothamrailmarine.com/product/nathan-airchime-p24r1/
June 20th, 2026 New Products
3 unique new horns today!
First up, is the Hancock 4700 air whistle. Known as the “Phallic shaped object in a dish” to railfans, the 4700 was an very mellow sounding air whistle. New Haven was the largest user of these, along with Seaboard, MN&S and some others here and there.
Hancock 4700 air Whistle – https://gothamrailmarine.com/product/hancock-4700-air-whistle/
Next up is the Nathan Airchime MS1. Kind of the bastard child of the M line of horns, the single chime MS1 was not super common. Santa Fe was a big user of these, on their FM switchers and well as some of the early Geeps. Reading used them on the SW1001’s, and of course plenty of industrials.
Nathan Airchime MS1 – https://gothamrailmarine.com/product/nathan-airchime-ms1/
Last up is a unique split manifold Leslie S-5T. This version was used on Norfolk & Western GP30’s. One one side was an S-3B-JR, and the other side used an S-2A-R. Both horns have tab back power chambers.
N&W Split Manifold S-5T – https://gothamrailmarine.com/product/split-manifold-s-5t-nw-gp30/
June 18th, 2026 New Products
We have gotten lots of requests for O scale parts recently, and we are going to test the waters again with two new horns, the Nathan Airchime M3R1, and the Leslie Supertyfon RSL-3L-R. Each of these come one to a package. Right now, I only have a handful of each available. If they sell, I will consider expanding into more as time allows, but HO scale will remain our core product line.
Nathan Airchime M3R1- https://gothamrailmarine.com/product/nathan-airchime-m3r1-1-48th-scale/
Leslie Supertyfon RSL-3L-R – https://gothamrailmarine.com/product/leslie-supertyfon-rsl-3l-r-1-48th-scale/
May 25, 2026 New Products
Alco Sand Fillers!
Today we are announcing Alco sand fillers. This version was used on RS11’s, RS27’s, RS32’s and other notch nose engines, as well as the Centuries. This is a basic round fill, that has an oblong hinged cap on top held closed with a small hand knob. Some C420’s, as well as C424/425 use a square hinged door on the rear, held closed with the same knob. This pack includes 8 of the round, and 4 of the square.
Alco Sand Fillers – https://gothamrailmarine.com/product/alco-sand-fillers/
May 18, 2026 New Products
Two new Gyralites!
This week we are announcing two more versions of the popular Pyle 20585 Gyralite, this time the external case mount (20585-B) version. Our model of the 20585 features a recess to use specifically with a 0402 LED. We include the clear lenses as well, so you can model the light as a 20585-BC which used one clear lens on top, and red on the bottom, or as a 20585-BW, which had two clear lenses. While we had to sacrifice one of the cross pieces in the glare shield, we assure you will be happy with them – they are .003” thick after all. Full hinge detail, case screws and thumb screw detail is present. Each pack includes two lights, as well as 8 lenses.
Pyle 20585-B Gyralite – https://gothamrailmarine.com/product/pyle-20585-b-gyralite-external-mount/
Pyle 20585-B Gyralite, w/Glare Shields – https://gothamrailmarine.com/product/pyle-20585-b-gyralite-external-mount-w-glare-shields/
April 26, 2026 New Products
4 New Horns! The first Leslie Supertyfon “U” horns!
Catalogued by Leslie as the “Universal” manifold, this was also known as the ultra-low profile manifold. Lore has it, the U manifold was originally developed for use on the EMD GP30’s, introduced in 1961. The U manifold was a 3 chime; however, it was offset to one side, with the outermost bell angled down, allowing greater clearances. We are offering the SU-3L in its earliest version first in 4 variations, with tab back power chambers, dating from around 1961-1968 before the dome back head was introduced. The U manifold horn designations get very muddy, so we are going to keep them simplified for the catalog. All of these versions are left hand mount manifolds. The U manifold continued in the Leslie catalog, however sales dwindled when the more common, triangular, low profile “L” manifold was introduced.
50304 – SU-3L-LF Version 1: This has all bells forward, with the 25-bell on the left side.
50305 – SU-3L-LF Version 2: This has all bells forward, with the 25-bell on the right side.
50306 – SU-3L-LR Version 1: This version has the 25-bell on the left, and the 44-bell reversed on the right.
50307 – SU-3L-LR Version 2: This version has the 25-bell on the right, and the 44-bell reversed on the left.
All four of these were common on the PRR (PC/CR) on the GP30’s, as well as on several Seaboard engines. The 50306 version with the 25 bell on the left, was used on several PRR (PC/CR) SD40’s, SD45’s and a slew of other engines. These were also used on a handful of EL C425’s and a few of the GP35’s, however they are all number specific.
The more common, later version with dome back power chambers will be coming down the road.
April 23, 2026 New Products
Today we have 5 new parts!
First up, two new versions of the Leslie Supertyfon S-5T. Both versions of this horn have all the bells facing forward. The first version, the S-5T is an older one, with tab back power chambers. This specific version is aimed at the Western Maryland modelers (we got some more horns coming for you guys’ next week!) but certainly used by others as well. The second version is the RS-5T, with the post 1979 spike back power chambers. I do not know who used these stateside, but this horn was common down in Australia. Both of these come two per package.
Tab Back Leslie S-5T – https://gothamrailmarine.com/product/leslie-supertyfon-s-5t/
Leslie Spike Back RS-5T – https://gothamrailmarine.com/product/leslie-supertyfon-rs-5t/
Next is another axle generator, this one a variation on the GE MM24. This generator is mounted on the 8-bolt, angled oil bath style journal cover. These were common on lots of late era RS’s including RSD12’s, RS27’s and others, as well as some early Centuries and GE U boats. These were used for the wheel slip system and typically had a cable drive speedometer on the other side of the locomotive (we have several of those too!). Includes 4 per pack with two wire options.
GE MM24 Axle Generator on Oil Bath Alco/GE Journals – https://gothamrailmarine.com/product/alco-ge-axle-generator-ge-mm24-oil-bath-journals/
Common to almost every locomotive is the basic ground/step light. A simple sheet metal housing with a mounting flange. Our set includes 16 lights: 8 with a mounting stem, and 8 flush mounts. The stem version has a hole in the side of the housing for the wires, and the flush version has a hole in the center.
Ground/Step Lights – https://gothamrailmarine.com/product/ground-step-lights/
Last part – I am happy to finally introduce our new line of scale coupler buffer plates! These have been in the works for some time. This first version is for the EMD GP9/SW1200. This is a wider, fabricated style. This is just the detail for the pilot – the stock coupler boxes are still used, just trimmed down. This coupler plate is wide enough that a standard KD shank will fit through it easily. Note, these do require some scratch building work in order to fill the pilot gaps left by the stock parts. Each pack includes 1 pair.
EMD SW1200/GP9 Scale Coupler Buffer Plate – https://gothamrailmarine.com/product/emd-sw1200-gp9-scale-coupler-buffer-plate/
We have several of these coming, including the Alco Century, Alco RS, Alco S, GP7, 1st Gen Switcher, Late 1st Gen EMD and Dash 2 EMD.
More stuff to come this weekend, including our first Leslie “U” horns!
April 11, 2026 New Products
Two new horns!
This week we have a unique, older horn, the Leslie Supertyfon S-3J-R. The “J” horn was part of Leslie’s initial offering of 3 chime horns in 1952. The horn uses the original high manifold, which was very narrow, as well as having the center bell raised up higher. This horn used bells #277, #330 and #440, with the larger #277 being two-piece construction, none of which have the large Leslie name blocks on the sides. Tab back power chambers are used.
We are offering this in two common versions for now – the Great Northern style, which has the #330 bell reversed on the left left. Some of these lasted into early Burlington Northern, specifically on the F units. The second version is a more “traditional” reversal, with the #440 reversed in the center. PRR (well into PC) was a large user of these, but they also showed up on LV, B&M, Rutland and some others.
GN – https://gothamrailmarine.com/product/leslie-supertyfon-s-3j-r-version-1-gn/
PRR, Others – https://gothamrailmarine.com/product/leslie-supertyfon-s-3j-r-version-2-prr-others/
This is a unique horn and very good sounding horn, not to mention a very rare one now. These will start shipping later this week. We will have a few more announcements later this week for the Spring Modelers Meet!
April 5, 2026 New Products
3 New Horns!
First up, one of the most highly requested and most recognized horns ever made – The Nathan Airchime M5R24. This version has scallop base bells and manifold, making it a post-1952 horn. This is the catalog arrangement, with the #2 bell reversed on the bottom right, and the #4 bell reversed on the upper left. This horn was common on a ton of passenger engines, as well as really everything else, right down to NW2’s on Western Pacific. Like all M horns, they fell out of favor and an M5 is all but a museum piece today. If there is enough interest, I will also offer this in early round base bells, but I doubt most modelers would care.
Nathan Airchime M5R24 – https://gothamrailmarine.com/product/nathan-airchime-m5r24/
Another M horn – this time for our Canadian friends, the M3HR4. While a basic M3 uses bell/heads #1, #2 & #3, the M3H uses bells #2, # 3 & #4 with #1, #2 & #4 heads in order to blow the Canadian mandated D Minor chord. This horn features the common Canadian reversal, with the #4 bell reversed on the left. This is also scallop based, dating it to post-1952.
Airchime/Nathan Airchime M3HR4 – https://gothamrailmarine.com/product/airchime-nathan-airchime-m3hr4/
Last is the Nathan/Nathan Airchime K5HR24/K5HAR24. The 5 chime “high” manifold was one of the original K parts, however this horn uses the later, non-adjustable caps, dating it to post 1969. This horn will double as both the Canadian K5H which uses bells #1, #2, #3, #4 & #5 (used one a number of US built GE’s into the early 1990’s as well), and the US version, the K5HA with bells #1, #2, #3A, #4A & #5. This horn has the 2-bell reversed on the top right, and the 4-bell reversed on the lower left.
Airchime K5HR24/Nathan Airchime K5HAR24 – https://gothamrailmarine.com/product/airchime-k5hr24-nathan-airchime-k5hr24/
These horns will begin shipping Monday the 13th.
Before anyone asks, yes, all of the above will be offered in all bell forward configurations down the road.
April 1, 2026 New Products
3 new horns! Well, technically 5…
This release is aimed at Chessie and CSX modelers.
First up is a new version of the Leslie RS-5T-RR (I am calling this one Version #3 for the catalog). This version is a CSX specific one introduced in the early 1990’s, in which the right two bells (31 and #44) bells are reversed mimicking the “R24” reversal used on the K5LA’s.
Next up are two Chessie horns: the high manifold S-3L-R and low manifold SL-3L-R. All 4 versions of this horn use the same basic setup, with the 31 bell reversed in the center however with the 25 on either side. We are offering this batch of horns in two packs: The S-3L-R with one 25 bell left, and one right, and the same with the SL-3L-R, one 25 bell left, and one right. If there is enough interest in these, I will split them up into individual packs.
These will begin shipping early next week!
Leslie SuperTyfon RS-5T-RR – Version #3 – 31/44 Reversal (CSX) –
https://gothamrailmarine.com/product/leslie-rs-5t-rr-version-3-31-44-reversal-csx/
Leslie SuperTyfon S-3L-R – 25 Reversal (Chessie) Set –
https://gothamrailmarine.com/product/leslie-supertyfon-s-3l-r-25-reversal-chessie-set/
Leslie SuperTyfon SL-3L-R – 25 Reversal (Chessie) Set –
https://gothamrailmarine.com/product/leslie-supertyfon-sl-3l-r-25-reversal-chessie-set/
March 24, 2026 New Products
Custom Horn Program!
We are finally announcing our next custom parts program – this time for horns! Do you have some crazy bell arrangement or mashup of parts you want to replicate in scale? Well, now you can! For a small setup fee, we can put together the horn of your dreams. We have an extensive catalog of parts (see below), with more on the way. There are a few things to note with this program –
– Not everything can be done, due to print limitations, etc.
– These will be handled between our regular workload, so the lead time will be a little longer (the horns have a much longer, non-standard post processing time as it is). You will not be asked to pay until your parts are ready to ship.
– We have several “common” horns already in our queue that will be released throughout the future. This program is reserved for one off/custom horn for road number specific/freelancers: IE, things that are realistically not worth adding to our catalog.
Now – Costs. The horn line is our most labor-intensive part at GR&M, so we are going to be charging an $8.00 setup fee in addition to the part costs: single chime horns are $6.00, two chimes are $8.00, and 3+ are $10.00 per two pack. If you require more, then we will work on a larger bulk rate.
Please EMAIL us with what you’re looking to do, and we will see what we can do!
This program is for 1/87th Scale only right now.
https://gothamrailmarine.com/product/custom-horn-program/