Worldwide Air Post Stamps and Postal History - Estonia

Worldwide Air Post Stamps and Postal History - Estonia

1923-40, black surcharge 10m and red surcharge 20m on 5m+5m yellow, black and light greenish blue, set of two perforated (11¼, Teetsov's private perf) values, in addition Carrier Pigeon 15s brownish red, two horizontal imperforate pairs on chalk-surfaced paper, all with full OG, LH or NH (imperf pairs), perf stamps expertized by Dr. Jemtschoujin, Est. $300-$400, Scott #C7-8, 152 imp