Here's mine. I know that the obverse chop mark means "work" and is pretty common. Haven't seen another matching the reverse chop mark - yet. This 1875 Carson City Trade Dollar (PCGS XF40) with Chop Marks and a type 2 reverse is supposedly one of rarest of CC trade dollar w chop mark varieties. PCGS estimates about 60 to exist, R8.4. But what I'm really interested in is seeing more trade dollars with CHOP MARKS! Yahoo!
Well, I'll try to answer that. First of all, Trade Dollars were minted for and primarily used in international trade (although some did wind up in domestic circulation). So..... Trade Dollars that actually went to China are often found with chop marks. Chop marks are typically Chinese characters punched into a coin that denote acceptance as a good weight piece by a merchant. Other coins besides trade dollars were often used in international trade and can also be found with chop marks. I'm sure others could add more nuance to this answer!
Thanks for posting some great examples of chop marked trade dollars. Such interesting coins. Is that all there is (as the song goes)?
