Sterling Guilloche Enamel Brooch Watch Pin Butterfly

Offered is a charming vintage guilloche enamel brooch.  Referred to as a watch pin, this was also used to hold a locket or other dangle charm.  The dainty piece is in the shape of a butterfly with an undulating decorative edge.  It measures 1 1/8″ x 1 3/4″ across the widest points.

This is marked sterling on the back of the wing and on the hook as shown.  The needle is marked German Silver, and this part is not sterling.  The old C clasp has been replaced with a  sturdy roll over catch. The jewelry has no other condition issues.