Postmarked on May 11, 1936. Please contact me at: azteccollectables at hotmail. Check out my other online auctions of rare and vintage stamps. My e bay store, Aztec Collectables, has a fine and growing selection of unique covers, stamps and postcards. The item "1936 USA Hindenburg Zeppelin First FLight cover to Germany LZ129 Special Deliver" is in sale since Monday, October 16, 2017.This item is in the category "Stamps\United States\Covers\Postal History". The seller is "aztec-collectables" and is located in Lake Worth, Florida. This item can be shipped worldwide.