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70. Semi-official separations: Included in this category are items like the Kansas City Roulettes, done with rouletting wheels by the Kansas City Post Office when it became necessary to sell to the public a quantity of leftover imperforate l¢ and 2¢ Washington Heads in 1914. A block of these is in the $75-$100 range.
Type 70: Kansas City roulette used on Scott 408.
Type 70: Scott 11, position 66R4, perforated at 12 1/2 on a flat bed perforator - the so-called "Chicago Perf" - prepared by Chicago dentist Elijah W. Hadley, who tried without success to sell the process to the Post Office Department. Hadley eventually used his samples on mail, with no objection from the Chicago Post Office, which had recommended Hadley's process favorably to Washington.
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