Antique enamel brooch with "Windsor" on the bottom.   The brooch has very colorful enamel.  I believe the brooch is brass.  It is an oldy with a simple c catch.  

The brooch has a flaw, there is a bit of enamel missing so there is a small gold place showing through.  The brooch is just under 1."  The pin is in good pre owned antique condition with normal signs of wear.  Photos are enlarged to show detail.