I just bought a set of Atlas O gauge passenger cars that are 21 inches long, Amtrac version. On the box it says they need 054 curves but I got them to go through GarGraves 042 curves(actual size 43 inches or a little more). On the bottom of each car is a switch to turn on or off the rear end red lights. I used an SD-45 to run the passenger cars around my layout, runs good with no problems.
Bought the set at a train show for $75.00, Atlas set # 6212 Amtrac 3-pack, has car numbers 54013 coach, 54021 coach, 53500 Dinette. Is this a new or slightly older set of Atlas cars?
Lee F.