I agree that posting some pics would be great. I'm one of those geeks who has studied them for years and can spot them from across the room. It's confusing at first, but then you begin to see patterns and similarities. The ones currently attributed to NY mints are dated 1747, 1771, 1772, 1774-1776, 1778, 1785, 1787 and 1788. Other pieces that are thought to have a chance of being American-made (but probably not NY) are dated 1777, 1783, 1784 and 1786. The NY pieces, including those currently attributed to Machin's Mills, number 36 varieties. Any halfpenny dated 1787 or 1788 is almost certainly from NY. As someone mentioned, only one variety is dated 1775 (Vlack 4-75A). Once you learn what that obverse looks like (See the coinfacts.com site), you can easily check for two rare varieties with the same obverse, 4-71C and 4-71D. And you can eliminate the most common British counterfeits, which are dated 1775. Only two varieties are dated 1776. One (9-76B) is very rare and has Cs instead of Gs Georgivs. The other (6-76A) is fairly common. Once you learn what it looks like, you can eliminate British 1776s and you can look for 6-72A, which shares the same 6 obverse. All the 1774s share the same reverse. Likewise, the 87C reverse is used with 18-87C, 19-87C, 20-87C, 21-87C, 23-87C, VT-87C and 25-87C (only 1 known). So, learning these reverses will help. There are others, but you get the picture. Posting a few that I've mentioned.