If memory serves, that strip of 3 was discovered somewhat recently - within the last decade or so??
Quote:For the first approximately 70 years that this issue was known, the largest multiples recorded were two pairs, one of which has been broken into two singles. The discovery of this strip by a Harding specialist created a sensation in the philatelic press before it was first auctioned by Matthew Bennett in 2007. In the process of expertizing the strip, the discoverer went to the National Postal Museum to study the eight proof sheets (3,200 stamps) pulled from the plates that were used for the rotary press printings. On the fifth sheet, the matching plating marks were discovered, proving that this multiple came from Positions 56-58 in the upper right pane of Plate 14867 -- a plate that was used only for rotary press printings.
Our updated census of the 2c Harding Rotary Perf 11, available at our website at
http://www.siegelauctions.com/dynam.../613/613.pdf , records 45 used singles (one faintly cancelled, if at all), one used pair and this unique used strip of three.