1c Green, Rotary Perf 11 x 10, Vertical Pair, Imperforate Horizontally (538a). Mint N.H. pane of 170 containing 83 pairs of the variety plus a plate block at upper left, radiant color, choice centering

EXTREMELY FINE. A STUNNING MINT NEVER-HINGED INTACT PANE OF 170 OF SCOTT 538a, THE 1919 ONE-CENT WHICH WAS SUPPOSED TO BE PERFORATED 11 BY 10.

During World War I, leftovers at the end of each rotary press coil roll had been accumulating. They were perforated 10 in one direction on the rotary press perforator, but were too short to be used for coil rolls (issued in rolls of 500 or 1,000). In an effort to save waste, they were later perforated 11 in the horizontal direction using the wheel-type perforator normally used for flat-plate printings, giving us Scott Nos. 538, 539 and 540. The imperforate horizontally sheets (Scott Nos. 538a and 540a) were acquired by by Edward C. Worden, who sold them through J.M. Bartels in 1922.

Scott Retail as plate block and 83 pairs

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