Fascinating MOP locket (opens and snaps tight) on a watch chain. Probably late Victorian. Chain is thick and worn from use and darker than the "T" bar and fob; approximately 12 inches in length. The MOP fob seems to be a higher gold content but not marked or tested. Decorative pins for holding MOP are loose but will tighten them to make them more secure. Fob is approximately 1 inch by 3/4 inches. It swivels. Really special.