Do not hesitate to ask me with any questions that you may have. I have been a full time stamp & coin dealer for the past 45 years. Member of the ANA, ASDA, NGC and dealer member of the American Philatelic Society. Stamps only certificates from either APS, PSE or from the Philatelic Foundation are accepted, however "graded" certificates or "encased" items are not accepted.Proof of the inability to express an opinion is not grounds for return. We use the finest in secure packaging to better protect your items. Powered by SixBit's eCommerce Solution. The item "C13-15, Mint VF NH Set of Three Zeppelin Stamps Very Fresh! Cert Stuart Katz" is in sale since Saturday, April 28, 2018. This item is in the category "Stamps\United States\Back of Book\Air Mail". The seller is "stukatz-stamps" and is located in Hampton, New Hampshire. This item can be shipped worldwide.