See also https://asiamedals.info/threads/imp...-made-by-the-st-petersburg-workshop-nb.30940/.
Silver, enamel.
Size 43.9×24 mm.
Weight 8.3 g.
Marked with a St. Petersburg assay office silver hallmark "84+anchors" from pre-1882 time period, round mark "anchors" and practically unreadable marker's mark "НБ" /unidentified workshop/. Original screw marked with a round mark "anchors" and marker's mark "НБ".
Marks.
Original screw.
Silver, enamel.
Size 43.9×24 mm.
Weight 8.3 g.
Marked with a St. Petersburg assay office silver hallmark "84+anchors" from pre-1882 time period, round mark "anchors" and practically unreadable marker's mark "НБ" /unidentified workshop/. Original screw marked with a round mark "anchors" and marker's mark "НБ".
Marks.
Original screw.