I have this halfpenny, it was labeled as a Machin's Mills Vlack 3-74A. However, it doesn't match any images of this variety I've seen, and I can't find any match from the plates I've seen online for possible die pairings. Is this just some other non-regal halfpenny? If it is a Machin's Mills, then does anyone know the Vlack # for it? If it makes a difference the coin weighs 7.70 grams.
Any help is appreciated.