13c Sound Recording Centennial, Brown Litho and Black Engraved Colors Missing (1705 var). Mint N.H. pane of 50, two stamps show different errors caused by a foldover, Position 41 with both Brown litho recording box and Black engraved "USA 13c" missing, Position 46 below shows a portion of the Brown litho color but is missing the Black engraved "USA 13c", Positions 26, 31, 36, 42 and 47 are "freaks" with portions of Brown missing, back of the pane shows where the missing colors were partially printed, Very Fine and extremely rare if not unique, these errors are unlisted in Scott and Datz but have been known by limited people since 1977, the year these were issued (as evidenced by a 1977 Jacques Schiff letter to the owner acknowledging the error and offering to auction it), these should be listed in Scott as Nos. 1705b and 1705c

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