AR Poltina (1/2 Rouble) 1877 SPB-HI. NGC AU-58. EX: Dmitry Markov "Coins & Medals" # 18, Lot: 1336 https://www.m-dv.ru/en/catalog/p,5679/image.html EX: Heritage Auction Galleries # 61434, Lot: 23154 https://www.m-dv.ru/en/catalog/p,470606/image.html