Art deco ring, white gold, 0.15 ct diamond

Raised crown of the ring. Decorative upper part of the ring. Art deco style. A diamond of a modern brilliant cut, set in the crown of the ring, weighing 0.15 ct, color G, clarity VS 2. White gold, fineness Au 750/1000. Total weight 2.65 grams. Last century. Czechoslovak hallmark (rooster head number 3). Ring size 49.