Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Czechoslovakia - 1922, two stamps with black inverted surcharges 50 on 100h green and 100 on 200h violet, full OG, NH or LH (C8a), VF, expertized by Blaha, Gilbert and others, C.v. $300 as hinged, Pofis #L4-5Pp, CZK8,000,Scott #C7a-8a