Watch List notes:

Russia 1 Rouble 1773 СПБ ЯЧ Т.И. St. Petersburg. Catherine II (1762-1796). Averse: Crowned bust right. Reverse: Crown above crowned double-headed eagle shield on breast X on tail. Silver. Edge cordlike leftwards. Petrov 2.50 rub.; Bitkin 216. PCGS AU 55