Industrialist whose pork packing plant, Armour and Co., introduced refrigeration and revolutionized methods of canning. Scarce fountain pen signature, “Sincerely, Philip D. Armour” on an off-white 3.5 x 1.75 card. Mounted and matted with two images to an overalI size of 12 x 13. In fine condition, with uniform toning.
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