Zeppelin Sieger 28D 1929 Round The World Flight USA Post. The item "Zeppelin Sieger 28D 1929 Round the World Flight USA Post with Scott 547 franking" is in sale since Sunday, August 3, 2014. This item is in the category "Stamps\United States\Covers\Postal History". The seller is "frumi" and is located in Hawk Point, Missouri. This item can be shipped worldwide.