Stamps generic certificates from The Philatelic Foundation, PSE, or the APS are accepted. NOTE "graded" certificates or "encased" items are not accepted. Proof of the inability of a competent authority to express an opinion is not grounds for return. We use the finest in secure packaging to better protect your items.The item "#C14 ON #UX27 POSTAL CARD 1ST ZEPPELIN ROUND THE WORLD FLIGHT BS197" is in sale since Thursday, March 12, 2015. This item is in the category "Stamps\United States\Covers\Event Covers\First Flight". The seller is "billsbargainstamps" and is located in New Milford, New Jersey. This item can be shipped worldwide.