Art Deco Opal Ring

750 (18k) white gold ring adorned with an opal cabochon in a half-closed setting supported by brilliant-cut diamond paving. French work. Half-erased eagle's head and goldsmith hallmarks finger size: 53 gross weight: 5.66 g size of the oval opal: 12 / 8/ 3 mm number of diamonds: 52 in total for approximately 0.52 ct (6 lines of each side) condition: good condition, traces of dirt, micro-scratches with gold, unmodified, untransformed item, as is. 415