| http://www.w3.org/ns/prov#value | - To be returned to: Visual Panographics, Inc., 488 Madison Avenue, New York, New York. (Research Note: Xograph was a trademark of Visual Panographics, Inc., the company that worked with Topps to produce the 1968 Topps 3-D set.) Because the ink stamps were hand-stamped by Visual Panographics, Inc., there are often natural minor imperfections to the stamp strike.
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