1934-35 Stratosphere Balloon Flights

I am interested in any covers/envelopes or ephemera related to the 1934-1935 Stratosphere Balloon flights from the Black Hills of South Dakota.  I'd be interested in hearing of any members that might have such items for sale, particularly any flown on the Explorer I (postmarked Omaha, Nebr) and Explorer II flights.  

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    James Catlin

    Yes, I do have some items you might be interested in, specifically the Explorer II, 1935 technical papers and a bookmark made from the balloon's skin. Feel free to call me at (702) 242-5362

    Regards, Jim

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