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

1931 (October 17-20), 3rd SAF entire stationery wrapper of 2c bister, uprated on reverse with 2½c yellow olive (on reverse) and German Zeppelin stamp of 1m carmine, Friedrichshafen ''17.10.31'' connection, green Flight cachet on front and confirmation six-line text on reverse along with Pernambuco ''20.X.31'' receiver, VF and scarce mixed franking item, Sieger #133 var, Est. $100-$150