Russia
U.S.S.R. nine-piece set of uniface die trials ND (1961), five pieces in copper-nickel, 17.3 mm, 19.5 mm, 22 mm, 24 mm, and 27 mm; and four pieces in aluminum-bronze, 15 mm, 18 mm, 22 mm, and 25 mm. All are in NGC holders certified Brilliant Uncirculated. These were struck in England (Birmingham), by a private company, as bank die trials for the Soviet government.
Estimate: 1000-1200 USD