Lot 10733 – 1933 (Oct.) Zeppelin Chicago Flight, cover from Lo

1933 (Oct.) Zeppelin Chicago Flight, cover from London franked by strip of four 1s values tied Oct. 12, also tied by bold Berlin connecting flight cachet (circular cachet alongside, cds of Oct. 13 on back), sent to member of Argentina’s Naval Aviation at Buenos Aires via Rio, with Buenos Aires machine bs (Oct. 19), uncommon commercial mail, fine (Sieger 238 E, € 650+)