Bidspirit auction | One Man Collection of Tannu

One Man Collection of Tannu Tuva - Postal Stationery Envelopes - 1939, stationery envelope 20k violet, printed on grayish yellow paper, size 163x128mm, interior type c, sent in 1942 from Kyzyl-Mazhalyk, tied by violet date stamp (Ustinovsky No.2.2), addressed to 10th grade of Soviet School in City of Kyzyl, violet arrival ''21.4.42'' marking (Ustinovsky No.2.1), uprated by stamp of 30k on reverse (not cancelled), fresh quality, VF and extremely rare, only a few are known, Ustinovsky #K3, Est. $6,000-$7,000