Item: Antique Victorian Gold Filled Mourning Fob Locket. This is not stamped or marked. It looks like gold fill to me. It's dated 1871 inside.
 
Measurements: 13/16th of an inch across and 1 & 1/8th inches long with bale.
 
Condition: Antique, previously owned. There are scratches and dents, most notably on the back of the locket.