The adaptor outputs 6V to the classic cars 6V battery. Use a regular12V starter/booster for any car. Connect the 12V booster/starter to the adaptor inputs.
The Postwar Freight Car Fleet: North American Freight Car Designs 1898-1947
Kato 10-2109 E233 Series 7000 Saikyo Line 4-Car Starter Set N Scale Model Train
KATO N GAUGE - GM2000104/20-852 - LNER CLASS 800 AZUMA 5 CAR STARTER SET BOXED
OXFORD/VANGUARDS 1:43 SCALE LOT OF 4 ASSORTED DIECAST CLASSIC CAR MODELS
VINTAGE BRASS DRAIN COCK, CLASSIC CAR, STATIONARY ENGINE 1/4 BSP (0.518 OD) THD.
4mm Scale Whitemetal Classic Car Kit (Not Sure Model) 1:76 Scale Model Railway