Walthers Trainline
Trainline(R) Diesel ALCO FA-1 Powered - Ready to Run

Union Pacific(R) #1500A
Walthers Part # 931-203, p. 54 Walthers 2012 HO Scale Reference
HO scale, $49.98, currently in stock at Walthers but is scheduled to be Phased Out

 
These workhorses feature colorful period paint and lettering to make them a must for vintage rosters. Locos feature cast metal frame, all-wheel drive and electrical pickup, powerful motor with flywheel, working headlight (FA only) and body-mounted couplers.
 
Matching cabless FB-1 Boosters are available separately for those roads that used them.