Лот 443. RUSSIAN EMPIRE AND FEDERATION. Alexander II. 1855-1881.  1/2 Kopeck 1871, St. Petersburg Mint, SPB. Bitkin 547 (R3). Extremely rare. 15 roubles according to Petrov. 150 roubles per set according to Ilyin. Beautiful condition with magnificent patina. NGC MS63 BN. (~€ 18'750/USD 20'225) From auction Künker 255, Osnabrück, October 2014, lot 5899 (price realized: EUR 42,000). From the Antonin Prokop collection, part 1, auction Aurea 6, Prag 2002, lot 331.