Signet ring in silver 800 thousandths and rectangular synthetic blue stone. 
Boar hallmark. 
Traces of an anchor and company hallmark. Probably Rivière et Compagnie, rue des Archives, Paris. 
Finger size 51
Possible sizing on this ring : yes
Thickness 3.7 to 11.2 mm, stone dimensions 10 x 7.9 mm 
PB. 6,6 g.
Timed Monday 15 June・18:00 (Europe/Paris)
Lot no. 20

Signet ring in silver 800 thousandths and rectangular synthetic blue stone. Boar hallmark. Traces of an anchor and company hallmark. Probably Rivière et Compagnie, rue des Archives, Paris. Finger size 51 Possible sizing on this ring : yes Thickness 3.7 to 11.2 mm, stone dimensions 10 x 7.9 mm PB. 6,6 g.

Result
€55
Buyer's premium
25%
Signet ring in silver 800 thousandths and rectangular synthetic blue stone. Boar hallmark. Traces of an anchor and company hallmark. Probably Rivière et Compagnie, rue des Archives, Paris. Finger size 51 Possible sizing on this ring : yes Thickness 3.7 to 11.2 mm, stone dimensions 10 x 7.9 mm PB. 6,6 g.
Sale Monday 15 June・18:00 (Europe/Paris)
Sale location coming soon 24, avenue Junot 75018 Paris