Art Deco Sapphire and Diamond Ring

Art Deco period ring from 1925, in 750/1000e (18 carat) white gold set with a dark navy blue oval sapphire surrounded and supported by 8/8 cut diamonds.
Sapphire: 10 mm / 7 mm / 4.10 mm for a total of approximately 2.30 carats
Diamonds: 14 of approximately 2 mm in diameter and 2 of 1 mm for a total of approximately 0.44 carat
Condition: good general condition, some scratches
Dimensions: 14mm main pattern / 14mm (with shoulder)
Gross weight: approximately 4.50 gr
Finger size: 53
Hallmarks: owl for 18 carat gold
ref. 538