Lot 1508 Spain

Revolutionary Overprints: Canary Islands Air; 1937 (18 Sep) Cover to Geneva bearing 50c + 1p25 dark blue tied along with 5c blue Pro Las Palmas label tied PORT VIA AEREA / LAS PALMAS datestamps with two Censura Oficial Militar IRUN h/s in violet plus CENSURA MILITAR / LAS PALMAS two line h/s in violet alongside. With pro Franco h/s in bottom left. Horiz. filing fold. Nice cover.