1925-1927 AIRMAIL STAMPS ÚTVARY / comp. 3 pcs of PC (story) with address sender AIRMAIL STAMPS UČILIŠTĚ - CHEB, AIRMAIL STAMPS UČILIŠTĚ - OLOMOUC and 1. LETECKÝ REGIMENT, 4.LETKA - PRAGUE - AIRPORT, all from one member air-mail units to same addressee to Plzen; good condition