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In his studies, Gates had determined that there were recurring sets of pairings of the colour, text and design of the word "Private Post Card" and the text "Stamp Here" that most commonly were found on the Wilson cards. These pairings, which he numbered 1 through 8, are reproduced below, and supplemented by additional combinations.
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Nearly all of the Wilson postcards and envelopes show a printer's imprint on their face. The exception is the the early printing of the British Ensign WLS-001, and P-1 WLS-002, which have no imprint. When used, the imprints come in 3 types, as follows:
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The listings of varieties are split into two categories, those found on postcards, and those found on envelopes.
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The listings of varieties are split into two categories, those found on postcards, and those found on envelopes.