Robert A. Siegel Auction Galleries, Inc. Sale - 1150 Page 35
: Around 1918, a significant group of 1875 Special Printings, including strips of Scott #167, was discovered in the possession of the widow of Charles F. Steel , a former employee of the National and Continental Bank Note companies. Private Special Reprint Nr 167
: Printed by the Continental Bank Note Co. using line-engraved intaglio on flat plates. Robert A