United States: Postal History 1930, Graf Zeppelin South America Flight cover, franked with 65c...

United States: Postal History
1930, Graf Zeppelin South America Flight cover,
franked with 65c, $1.30, and $2.60 set of three Graf Zeppelin Air Post, tied by New York (30 Apr) machine cancel, dual USA and German confirmation cachets, with violet circular "This Article Made the Complete Round Trip / Via Graf Zeppelin" handstamp, green New York / Graf Zeppelin (18 Jun) backstamp, a few bent perfs to stamps from being affixed near top of cover, else a fine and scarce usage.
Cover