Don, was there a variant made by another supplier? The reason I ask is that after 1931 ('32 up style very similar to A, different location of hose outlet) there were generally two suppliers, one using the screw-on cup top as shown, the other with a tin cap showing a nut-like stamping that crimped over a flange...has to be finessed a bit to rotate the cap off the flange. On these all dimensions and the location of hose outlet are identical other than said top.