No such thing as a stupid question, eh? An all-time favorite eBay email...
I was just reminded of this absolute gem that came in a number of years ago. It ranks as one of the best emails I've ever gotten on eBay.
Question received: "I collect shipwreck coins. Does the "Grosvenor" counterstamp indicate that this coin came from the East Indiaman shipwreck of the GROSVENOR of 1782?"
Item in question: 1814 Great Britain 1 Shilling, 6 Pence bank token with "Grosvenor" counterstamp