Stack's Bowers & Ponterio
Collector's Choice October 2021 Auction 12-14 Oct 2021
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2) U.S.S.R. 1924-NA. Leningrad (St. Petersburg) Mint. PCGS MS-62. KM-Y-90.1.
A great pair from the turbulent period just after the Russian revolution.
Estimate: $150 - $300