What a unique piece of vintage jewelry.   Great piece for any collector, it would also make a wonderful gift.  

It is 52mm north to south and 37mm east to west.    It is fully hallmarked, has been tested, and verified weighing in at 7.5 grams.   There are no problems, This item is pre-owned and there will be ordinary and normal use marks.. Comes from a clean, smoke-free home. 
 

Please take a look in our eBay store for many other fine pieces of jewelry.