You are viewing an 18K white gold filigree ring made in the 1920's. The ring is set with a real ancient silver drachma coin from the reign of Alexander The Great and dates from 336-323 BC. The coin is a "Lifetime Issue" coin. On the back it depicts Zeus. The diameter of the coin is 16mm by 17mm. The ring is marked 18K. It is a size 6 1/2 and can be re-sized. The ring weighs 6.8 grams.