1c Green, 2c Carmine, Ty. I, Kansas City Roulettes (408 var, 409 var). Blocks of four of each, 1c with selvage at right, 2c top left corner selvage, each with neat Omaha Nebr. oval registry cancels, few minor roulette flaws as usually seen on this issue, Very Fine and choice, a scarce set of used blocks of this officially sanctioned private perforation, Scott Catalogue and other sources note that in late 1914 the Post Office in Kansas City Mo. had on hand a stock of imperforate sheets originally intended for use in vending machines. The postmaster, W. N. Collins, sent some clerks to the local dry goods store where they bought 15 inexpensive dressmaker's tracing wheels. Each wheel was slightly different. The earliest documented use of either is Oct. 22, 1914 (the 1c). They were taken off of sale on January 14, 1915, nine days after official approval was given. They are far scarcer in used condition. Accompanied by 2006 article by Randy L. Neil on this fascinating issue.

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