Mechanical engineers and entrepreneurs who founded Warner & Swasey Company, an American manufacturer of machine tools, instruments, and special machinery. Rare matte-finish 6.5 x 5 photo of the industrialists sitting together, signed in the lower border in pencil, “W. R. Warner,” and fountain pen, “Ambrose Swasey,” and dated January 13, 1927. In fine condition, with slight brushing to the pencil signature. This is the first example of either of these influential industrialists we have offered. RR Auction COA.