Uncataloged RailKing O Scale RS-3 Diesel Locomotive NOW IN STOCK

November 26, 2025 - M.T.H. Electric Trains has released an exclusive RailKing O Scale RS-3 Diesel locomotive in Delaware Ostego System livery for exclusive distribution by M.T.H. Authorized Retailer E-Z Catch. The locomotives are now available in two unique cab numbers in very limited quantities on a first-come, first-served basis.

Item No. 30-21188-1 Delaware Ostego System RS-3 Diesel Engine With Proto-Sound 3.0
Car No. 100
Sale Price: $349.99 (Plus Freight)
Click HERE to order from E-Z Catch.

Item No. 30-21189-1 Delaware Ostego System RS-3 Diesel Engine With Proto-Sound 3.0
Car No. 103
Sale Price: $349.99 (Plus Freight)
Click HERE to order from E-Z Catch.

ABOUT THE RAILKING O SCALE RS-3 DIESEL LOCOMOTIVE

By the time the first RS-3's rolled off the assembly line in 1950, Alco had refined its road switcher concept to create "a truly universal locomotive which could do anything and go almost anywhere," in the words of author J.W. Swanson in New Haven Power. In contrast with its predecessor, the 1000 hp RS-1, the 1600 hp RS-3 had all the power of a road diesel of its time and could boil along at up to 80 mph.

For awhile in the early 1950's, ALCO looked like a true contender in the burgeoning road switcher market. RS-3's could be found on a majority of class one railroads doing everything from switching and transfer duties to mainline freight and even passenger and commuter service.

Ultimately, however, the RS-3 took a distant second place to Electro-Motive's GP7 and GP9 in sales volume. Perhaps what doomed Alco was EMD's already-commanding lead in the road diesel market - in part because EMD's FT was the only road diesel allowed to be produced during World War II, when diesels began their takeover of American railroads. Other builders were relegated to producing diesel switchers until the conflict ended.

There was also talk that Alcos were less dependable. In hindsight, however, that seems to have been a result of EMD's sales lead. Perhaps shop crews were simply less familiar with Alco's model 244 prime mover and how to service it. In fact, roads with primarily Alco fleets, such as the New Haven, found Alco products to be very reliable when maintained properly. With their power and flexibility, RS-3's proved their worth so successfully that many railroads kept them on active duty after other first-generation diesels had been retired. They survived on class 1 railroads until the Delaware & Hudson retired its last RS-3 in 1986 and remained active in shortline and industrial service for years afterward.

EXCLUSIVELY AVAILABLE THRU:

E-Z Catch Train Shop
5 Tysen Street
Staten Island, New York 10301
718-727-7373 - Ask for Pat
www.e-zcatchworld.com
e-zcatch@verizon.net

M.T.H. Electric Trains will be releasing the 2026 RailKing O Gauge Steel Caboose in SIX different schemes next Spring. Each caboose will be available in extremely limited quantities and are expected to begin shipping to M.T.H. Authorized Retailers in April 2026.

Check out each of these offerings HERE.

These items are available to order from your local M.T.H. Authorized Retailer.

M.T.H. Electric Trains will be releasing the 2026 Premier O Scale E-44 Rectifier Electric Locomotive in SIX different schemes next Spring. Each locomotive will be available in two prototypical cab numbers in extremely limited quantities and are expected to begin shipping to M.T.H. Authorized Retailers in April 2026.

Check out each of these offerings HERE.

These items are available to order from your local M.T.H. Authorized Retailer.

M.T.H. Electric Trains will be releasing the 2026 RailKing O Gauge Engineering Car in Five different schemes next Spring. Each car will be available in extremely limited quantities and is expected to begin shipping to M.T.H. Authorized Retailers in June 2026.

Check out each of these offerings HERE.

These items are available to order from your local M.T.H. Authorized Retailer.