3 carat Engagement Ring Natural Blue Sapphire Ring OM Sterling Silver US 8

Engagement Estate Ring Natural Blue Sapphire Ring in Sterling Silver US 8 Stamped OM (it seems OM or AM the Maker's Mark!) and 925 Old of many decades (50-80 yrs) Lots of patina on the silver, may be cleaned by a professional The sapphire stone was tested and it is natural and genuine, about 3 ct in total