I have noticed two different series catalogue numbers for the Bachmann tank cars ie 881xx and 884xx.
Are both of these 1:20.3 scale?
Trevor James
Downunder
Of those, the first one (881x) has a frame, the (884x) are the frameless; both are 1:20.3 SPECTRUM quality cars. The older 1:22.5 big hauler tank is a 9xxxx number.
Matthew (OV)