You are bidding on what I believe to be a vintage Coro Coat of Arms brooch, with roll over clasp to the rear.
With red and green enamel.
Not 100% sure it is Coro as it is not marked to the back. From research they do say that not all pieces were marked?
Please see all 12 photos.
Measures approximately 5cm x 3.8cm.
Fully working rollover clasp and in overall good condition.