800 Silver Marcasite French Art Deco 1920 Watch Brooch

c1920 What a beautiful example of Art Deco design from France (crab hallmark on side of case). 800 silver. The brooch is set with marcasite. Has a 15 jewel movement which nt longer is working. 1.75 in. L, 1.15" wide. Besides not working- the condition is very good. Crystal is clear -no scratches, I don't see any marcasite missing. Layaway available.