Russian Empire, St. Petersburg.
Last Quarter of the 19th century
Size 57 x 48 mm.
Weight 32.16 g.
Hallmarks: on the front side the assay "84" in the shield with anchors and the scepter in the shield and the nameplate "NB" in the rectangular shield. On the twist there is a stamp with anchors and a scepter in a round shield. On the washer there is a stamp with anchors and a scepter in a round shield.