Watch List notes:

Russia 1 Polupoltinnik 1791 СПБ-ЯА St. Petersburg. Catherine II (1762-1796). Obverse: Bust of Catherine II right. Lettering: Б•М•ЕКАТЕРИНА•II•IМП•I САМОД•ВСЕРОСС. СПБ. Reverse: Two-headed eagle with a crown above. Denomination; date. Lettering: 17 91 ПОЛУПОЛТИННИКЪ. Silver. Edge cordlike leftwards. Bitkin 352. NGC MS 61