Back in the day there were several different Monobloc float chamber covers available. One of the differences was that the word Amal cast into the cover was at a different angle so that when the carb was used in different fitting applications (ie downdraught or flat,) the word Amal was horizontal, or as near as possible. The single cover that Amal make now doesn't cover all these fittings. (And also the wording is subtly different.) Small point I know but the angle of the logo really does look odd in some situations like my Mk 1 Inter.
REgards, Mark