I have a 1954 Super A1 that has a marvel carburetor on it. It does not have a tag and the idle air adjustment screw is on the block side of the top housing. With this type of arraignment, I don't believe this to be the correct carburetor for this tractor, but maybe for one where the carb would be mounted on the right hand side of the engine. Does anyone with a super A1, 100, or super C know what carb would have come on these tractors in mid year 1954? I know it could be either a marvel, zenith, or Carter, but would like to know part numbers or carb numbers if possible. Trying to restore this one as accurately as possible. Thanks