I found this at a yard sale last weekend and am real curious as to what it is. It is 34mm in diameter and 12mm tall. It is to be worn as a pendant. I appears to be made of pewter and brass. The brass outer ring can be rotated to line up a hole in it with letters representing the months of the year(?). If I wasn't an old man with failing eyesight, the hole in the brass ring can be lined up with numbers inscribed inside the ring 1-12. In addition, directly across from the 1-12 is also inscribed SW with the circle r of the trademark symbol on one edge, on the other edge are the Latin words "Carpe Deim"(sieze the day). The woman I bought this from said she thought it was a mechanical compass from Harry Potter, but I've been all over the web and haven't seen anything like it. My nephew, a big time Harry Potter fan also said he didn't recognise it. In addition, as a trained navigator, I tried to get it to line up in any way with the cardinal points with no luck. Any ideas?
Last edited: