Auction #93 Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World

GROUP OF: 12 items delivered by South America Return Flights 1931-36, 11 Zeppelin Flights starting with 4 covers and cards from SAF of 1931, including 1 item of 1932, 3 of 1933, 1 of 1934, 2 of 1935 and the last one is Hindenburg 1st SAF of 1936, all with appropriate franking cancellations and flight cachet, mostly VF, Sieger #125B/404, Est. $400-$500