EXTREMELY FINE. WITHOUT QUESTION ONE OF THE FINEST "CHICAGO PERF" COVERS EXTANT AND ONE OF THE FEW WITH AN ILLUSTRATED ADVERTISING CORNER CARD. A MAGNIFICENT ARTIFACT FROM THE EARLY PERIOD OF PERFORATED UNITED STATES POSTAGE STAMPS.
Observing the Chicago Perf covers mailed by business firms, W. Wilson Hulme II observed "[it is likely] these businesses used the stamps because Swift actively distributed them... When the businesses are plotted on a 1856-era map, a pattern emerges. Most of these businesses were in a straight path between Swift's bank and Hadley's office. One business, E. S. Wells, shoe manufacturing and sales [the cover offered here], was downstairs in the same building as Swift." (Chronicle 175, p. 167). Swift was a promoter of the Chicago Perfs, and Hadley was the inventor who designed the machine.
With 1991 P.F. certificate