Watch List notes:

Russia 6 Roubles 1829 СПБ St. Petersburg. Nicholas I (1826-1855). Obverse: Crowned double-headed eagle. Reverse: Denomination; date. Lettering: 4 ЗОЛ· 82 ДОЛ· ЧИСТОЙ УРАЛЬСКОИ ПЛАТИНЫ * 6 * РУБЛЕЙ НА СЕРЕБРО 1829 С.П.Б. Platinum 20.71g. Edge ribbed. Bitkin 55 (R2) RARE NGC VF DETAILS