1893 Worlds Columbian Exposition Box Medal. Sterling Silver. 37.6 mm. Eglit-92, Rulau-B103. About Uncirculated.This is a cleverly made medal, hollowed out in the center, with a double hinged lid that can close tightly, making whatever is hidden inside virtually undetectable. Usually used locket-style to enclose a photograph of a loved one, this piece is empty, although the interior supporting ring is stamped STERLING. The piece shows little or no wear, but there are some marks where the hinge is attached to the lid that probably are evidence of someone trying to open the device.