PANAMA: 1930, First flight Panama to Costa Rica, 10 c. postal stationery registered cover with additional franking from "PANAMA 10.MAR." with special cachet to San Jose with arival mark, cover with small cut at left, otherwise fine (Image)

Start Bid € 80

USA: 1931, Trans-Atlantic flight Liberty to Copenhagen with plane "Liberty", pre-printing cover from "LIBERTY JUN 19" with postage stamp 2 c. and aviators signature "Otto Hillig" and "Holgar Hoiriis" to Cophenhagen with arrival mark on postage stamp (Image)

Start Bid € 90