Item: Vintage Gold Filled Floral Heart Shaped Locket Necklace. This is stamped JMF Co 1/20 GF Sil Ace. I'm not sure what the material under the flowers is. It looks like opalized celluloid.
 
Measurements: Total length of the locket, including the bale is 7/8th of an inch long. The heart measures 13/16th of an inch X 3/4 of an inch. The chain measures 18 inches long.
 
Condition: Vintage, previously owned. The hinge is a little loose and the locket doesn't snap tight. I'm not sure what type of adjustment needs to be made.