@RoyBoy posted:Yes. That is a Williams F7. It matches the old AMT tooling, although AMT never made a B unit as far as I can tell.
Correct - AMT (American Model Toys)/Auburn KMT/KUSAN never made up tooling for a B unit to go with the F unit first offered by AMT in the early 50s. Williams (who purchased the original AMT-made tooling for the F unit) eventually had the B unit tooled up to match the A unit originally offered by Jack Ferris' AMT line made in Auburn, Indiana.