Stack's Bowers & Ponterio
October 2022 Hong Kong Auction 9-13 Oct 2022
View prices realized
2) 2 Mongo, AH 15 (1925). PCGS AU-55. Leningrad (St. Petersburg) Mint. KM-2.
3) Mongo, AH 15 (1925). PCGS EF-40. Leningrad (St. Petersburg) Mint. KM-1.
4) Mongo, AH 27 (1937). PCGS Genuine--Damage, AU Details. Leningrad (St. Petersburg) Mint. KM-9.
Estimate: $150 - $300