Available Items


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0
  • Chicago South Shore


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0
  • Great Northern


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0
  • Union Railroad


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0
  • Erie


O Gauge RailKing SW-1 Switcher Diesel Engine w/Proto-Sound 3.0
  • Philadelphia Bethlehem & New England

Uncataloged Limited Edition RailKing SW-1 Diesel Locomotives Announced

January 19, 2021 - M.T.H. Electric Trains has announced special limited-edition releases of the RailKing SW-1 Diesel Locomotive in six different liveries. These unique releases are part of a series of products representing the last M.T.H. production runs as the company concludes its 40 year history this Spring.

Each of these locomotives can be ordered from your local M.T.H. Authorized Retailer.

Click on any of the item numbers to the left to learn more about each locomotive.



The birth of the SW1 in January 1939 was a historic moment for the Electro-Motive Corporation. The tiny switcher ("S" for six hundred horsepower, "W" for welded frame) was EMC's first truly mass-produced loco, the first with Electro-Motive's own electrical gear, and the first mass-produced engine powered by the 567 diesel motor - which would become the backbone of first-generation American diesel power. Popular with railroads large and small, the SW1 stayed in production for 15 years, and many remained in service for three or more decades.

Our RailKing Scale SW1 offers Premier level details at a RailKing price. Separately added metal detail parts include front, side, and rear handrails; bell and horn; grab irons to allow access to the top of the hood; and handles for the sandbox lid on the front pilot (which doubled as a convenient seat for yard brakemen). Built to full 1/48 scale proportions, this model also offers authentic, legible EMD builder's plates and directionally operating front and rear headlights. Single or dual exhaust stacks, per individual prototypes, are also featured.

Our SW1 includes dual pickup rollers on each truck, making this model nearly stall-proof on any three-rail O gauge switches, despite its short wheelbase. Throttle down as low as three scale miles per hour to muscle a heavy cut of freight or passenger cars around your terminal - and maintain that speed as long as you wish, thanks to Proto-Speed Control and twin flywheel-equipped motors. Listen to the authentic chant of a first-generation EMD 567 motor. Pick up and drop off cars wherever you like, with remotely activated front and rear Proto-Couplers. Our full-scale, fully featured model of this tiny EMD workhorse offers everything you could want in a hard-working yard switcher.

Product Features

  • Intricately Detailed, Durable ABS Body
  • Die-Cast Truck Sides, Pilots and Fuel Tank
  • Metal Chassis
  • Metal Handrails and Horn
  • (2) Handpainted Engineer Cab Figures
  • Authentic Paint Scheme
  • Metal Wheels, Axles and Gears
  • (2) Remote-Controlled Proto-Couplers
  • Prototypical Rule 17 Lighting
  • Directionally Controlled Constant Voltage LED Headlights
  • (2) Precision Flywheel-Equipped Motors
  • Onboard DCC/DCS Decoder
  • Locomotive Speed Control In Scale MPH Increments
  • 1:48 Scale Proportions
  • Proto-Sound 3.0 With The Digital Command System Featuring Freight Yard Proto-Effects
  • Unit Measures: 12” x 2 3/4” x 4”
  • Operates On O-27 Curves

    Diesel DCC Features


  • F0 Head/Tail light
  • F1 Bell
  • F2 Horn
  • F3 Start-up/Shut-down
  • F4 PFA
  • F5 Lights (except head/tail)
  • F6 Master Volume
  • F7 Front Coupler
  • F8 Rear Coupler
  • F9 Forward Signal
  • F10 Reverse Signal
  • F11 Grade Crossing
  • F12 Clickety Clack (On/Off)
  • F13 Idle Sequence 4
  • F14 Idle Sequence 3
  • F15 Idle Sequence 2
  • F16 Idle Sequence 1
  • F17 Extended Start-up
  • F18 Extended Shut-down
  • F19 Rev Up
  • F20 Rev Down
  • F21 One Shot Doppler
  • F22 Coupler Slack
  • F23 Coupler Close
  • F24 Single Horn Blast
  • F25 Engine Sounds
  • F26 Brake Sounds
  • F27 Cab Chatter
  • F28 Feature Reset