Russia
Nicholas I copper Proof Pattern Denga (1/2 Kopeck) 1840 C.П.Б. PR66 Red and Brown PCGS, St. Petersburg mint, Bitkin-935 (R2). Obv. Crowned monogram. Rev. Date and value. Fully mirrored fields, with pristine surfaces and abundant remaining original luster. The finest certified example. Ex: Dr. Robert Hesselgesser Collection.
Estimate: 3000-3500 USD