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 "287, Mint H 4¢ Top Plate Block of 4 CV $850.00 Stuart Katz" is in sale since Friday, September 3, 2021. This item is in the category "Stamps\United States\Plate Blocks/Multiples". The seller is "stukatz-stamps" and is located in Hampton, New Hampshire. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Australia.