Available Items


O Gauge RailKing ES44AC Imperial Diesel & Caboose Set With Proto-Sound 3.0
  • G.E. Evolution


O Gauge RailKing Box Car w/Power Meter
  • G.E. Evolution

2022 RailKing O Gauge GEVO ES44 Diesel/Caboose Set Announced

March 1, 2022 - M.T.H. Electric Trains will be releasing several limited-edition releases of RailKing ES44 Diesel/Caboose Sets later this Fall beginning this week with the unveiling of the popular General Electric GEVO scheme. The 2022 configuration features a matching RailKing Steel Caboose sporting car number 2022. In addition, a matching RailKing Boxcar with Operating Power Meters is also being offered. The Power Meter car will go great with this year's offerings or previous runs of the RailKing GEVO scheme which first began appearing in the M.T.H. RailKing lineup in 2013. Each of these offerings is expected to begin shipping to M.T.H. Authorized Retailers in September 2022.

The top-of-the-line RailKing Imperial model of this modern freight mover features a full range of locomotive sounds recorded from an actual ES44AC. Outfitted with two powerful flywheel-equipped motors, all-metal wheels and gears, and our revolutionary Proto-Speed Control, our ES44AC will haul long freights at any speed from a crawl to full throttle. Remotely activated front and rear Proto-Couplers allow you to pick up and drop off freight wherever you like. Additional Imperial features on the ES44AC include operating diesel exhaust smoke, flashing LED ditch lights, and operating LED Charging Lights.


Check out each of the schemes in the list on the left.

Product Features

Set Contents


  • ES44 Diesel Locomotive
  • Steel Caboose

Locomotive 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
  • Lighted LED Cab Interior Light
  • Illuminated LED Number Boards
  • Operating LED Ditch Lights
  • Operating LED Charging Lights
  • (2) Precision Flywheel-Equipped Motors
  • Operating ProtoSmoke Diesel Exhaust
  • Onboard DCC Receiver
  • Locomotive Speed Control In Scale MPH Increments
  • Near Scale Sizing
  • Locomotive Measures: 17” x 2 1/2” x 3 3/4”
  • Operates On O-31 Curves

Caboose Features


  • Intricately Detailed Durable ABS Body
  • Stamped Metal Floors
  • Metal Wheels and Axles
  • Die-Cast 4-Wheel Trucks
  • Fast-Angle Wheel Sets
  • Needle-Point Axles
  • Operating Metal Latch Couplers
  • Caboose Interiors With Overhead Lighting
  • Decorative Brake Wheels
  • Separate Metal Handrails
  • Near-Scale Proportions
  • Locomotive Measures: 17” x 2 10 1/4” x 2 1/2” x 4 1/4”
  • Operates On O-27 Curves

Boxcar With Operating Power Meters Features


  • Intricately Detailed Durable ABS Body
  • Metal Wheels and Axles
  • Die-Cast 4-Wheel Trucks
  • Operating Die-Cast Metal Couplers
  • Colorful, Attractive Paint Schemes
  • Decorative Brake Wheels
  • Fast-Angle Wheel Sets
  • Needle-Point Axles
  • Sliding Car Doors
  • Operating Analog AC Power Meter
  • Unit Measures: 11 5/8" x 2 1/2" x 3 3/8"
  • Operates On O-27 Curves