Zeppelin Flight. 1933 (September 30 - October 4), 8th SAF cover from Koroko to Buenos Aires, mixed franking with Upper Volta of 18 stamps altogether, tied by Koroko ''7.SEP.33'' ds, Friedrichshafen ''30.9.33'' connection, violet confirmation marking at top left, Buenos Aires ''6.OCT.33'' arrival on the back, mostly VF and very rare, only a few known, Sieger #235, Est. $1,500-$2,000 (Image)

GROUP OF 29 PIONEER FLIGHT ITEMS: 1925-50, East London-Durban, East London- Pretoria, Cambridge-Natal, Dudtschorn-Pretoria of 1925, Windhoek- Grootfontein of1931, several covers to Germany and Switzerland, K-U-T cover to Dresden and many more, nice quality overall, F/VF, Est. $400-$500 (Image)

Zeppelin Flight. 1934 (May 26-29), 1st SAF registered cover from Lome via Dakar to Brazil, franked by seven definitive stamps, Frankfurt on Main and Friedrichshafen connection markings, red confirmation cachet, Pernambuco ''29.V.34''arrival ds, mostly VF and rare, Sieger #247, Est. $1,200-$1,500 (Image)