Dating from the later Victorian era, a brass frame photo pinback.  The mourning or memory photo of a man measures 1-1/4" in diameter.  The brass frame is simple with the straight pin back in working order.  

Covering the photo, is a celluloid (or type) disc to protect the photo underneath.  Some discoloration of the brass with age and scuffs to the finish of the celluloid covering.  Nothing that wouldn't be expected.