RUSSIA. 1/2 Kopek (Denga), 1911-CNB. St. Petersburg Mint. Nicholas II. NGC PROOF-63 Brown. KM-Y-48.1; Brekke-22; Bit-271 (this coin cited). Yielding deep olive-brown surfaces, this enchanting specimen is quite <strong>RARE</strong> in proof and should generate great interest on account of its resounding beauty and the fact that it garnered a mention in Bitkin. Ex: Dr. Robert Hesselgesser Collection.