The first 50 M1a locomotives, #6700 - 6749, were built by Baldwin. The Juniata Shops, which became knows as te "Altoona Works, " built the next 25 M1a's numbered 6750 - 6774, and the remaining 25 M1a's were built by Lima and were numbered 6775 - 6799. Starting in 1946, 41 of the M1a's received further improvements by increasing the boiler pressure and adding circulators to the firebox.The improved M1a's became the M1b class. The best way to tell them apart is to look for the circulators on the firebox just above the running boards.
The circulators are those round objects in a diagonal line that look like wash-out plugs. The PRR M1a/b's were considered to be the finest of the PRR's steam locomotives. And in the end, they even hauled the heavy ore trains, which there were not originally intended to pull. They did it all in style! Features: ALL-NEW Paragon2 Sound & Control System Integral DCC Decoder with Back EMF for Industry Best Slow Speed Operation in DC and DCC Motor Type: 5-Pole Can with Skewed Armature & Fly Wheels Authentic PRR M1a Sounds Premium Caliber Painting with Authentic Paint Schemes Prototypical Light Operation with Golden White LED Headlight and Reverse Light Jewel Beautifully Detailed, Accurately Modeled Locomotive Separately Applied Details such as brass bell, grab irons, and ladders Constant Intensity Directional Lighting Factory-installed Painted Engineer Figures Locomotive Composition: ABS plastic with Die Cast Chassis Tender Composition: ABS plastic with Die Cast Chassis Locomotive Length: 6.5 inches Tender Length: 3.8 inches Couplers: 1 rear Microtrains #1015 compatible & Dummy front coupler Recommended Minimum Radius: 9.75 inches.Crazy Train Hobbies is your full-line hobby shop! Different road number may be pictured. Please always check description for the road number you are ordering. Brand: Broadway Limited Item Number: 3074 Scale: N Category: Locomotives Control: DCC/Sound Equipped Road Name: Pennsylvania/PRR Road Number: 6798. Doing so is against U. Y2PLAY Stores ships all items within the USA and it's territories. Items must be in new condition with all tags, packaging, and accessories included exactly as they were received. Some items are not returnable as follows: chalked cues, liquid or aerosol products that have been removed from their packaging, items which may touch the mouth mouthpieces, microphones, harmonicas, etc. If they have been opened or removed from their original packaging. The item "Broadway Limited N Scale PRR Class M1a 4-8-2 Sound/DCC Pennsylvania RR #6798" is in sale since Wednesday, June 15, 2016. This item is in the category "Toys & Hobbies\Model Railroads & Trains\N Scale\Locomotives". The seller is "ligriv1" and is located in Altoona, Pennsylvania. This item can be shipped worldwide.