Russia, Catherine II (1762-1796), 10 rubles 1778 СПБ, mint St. Petersburg
coin converted in the era to a pendant? reward medal?
obverse: bust of the Tsarina with a "long neck" and wearing a crown on her head, facing right and legend:
Б-М-ЕКАТЕРИНА-II-IМП-И САМОД-ВСЕРОСССreverse: coats of arms of four Russian governorates, in the center on the shield a two-headed tsarist eagle, and between the coats of arms the date 1-7-7-8 and the legend:
IМПРСКАЯ-РОССÏЙС-МОН-ЦЕНА-десять-РУБ
917 gold, weight 12.48 grams, diameter 29 mm