Train Battery Box Car with Two Contact Holes, Red Switch Lever, Blue and Red Magnets, Red Wheels, and Light Gray Roof with Hinged Doors Pattern on Both Sides (Stickers) - Set 7720 :
Custom Train St. Louis Metrolink please Read - Etsy
Train Battery Box Car with Switch and Red Wheels and Cargo Doors Pattern on Both Sides (Stickers) - Set 7720 (Undetermined Type) : Part x488c01pb03 | BrickLink
Diesel Freight Train Set, battery : Set 7720-1 | BrickLink
Lego 7824: Railway Station - Etsy Hong Kong
Sold at Auction: LARGE LOT ASSORTED LEGO TRAINS, CARS & CONTROLS