This is a Silver Charm figural Cannon for a Charm Bracelet. It measures 3/4" in length and the Wheels measure 3/8" in diameter. It has a very black finish on it, so it resembles a really old Cannon. We could not find a mark on it for Sterling, but feel that it is more than likely. We would guess that there are not many Cannon Charms are out there for a Charm Bracelet. The Dime Coin is just for perspective of size of the charm.