FANTASTIC AND INTERESTING WATCH FOB PIECE!  Please see all pictures of this beauty.

5 1/2" total length.  Good chance for an antique fob collector. 

A pocket watch was meant to attach to the opposite side of the shell.  The shell and gold piece would then hang outside of the pocket while the pocket watch was on the inside.

Signs of age on metal as seen in pictures.  The shell has no damage. SEE PICTURES.

Location E1, MER