Walworth Mfg Co

America’s most prolific turn of the century (1900) adjustable non-monkey wrench manufacturer.

Stillson (1826-1899), a mechanic at the Walworth Company, in Cambridge, Massachusetts, created the first such wrench. On October 12, 1869, U.S. patent #95,744 was issued to Stillson. On 17 August 1888, the Swedish inventor Johan Petter Johansson (1853-1943) took out his first patent on the adjustable pipe wrench.

More info at
https://www.bostonglobe.com/2019/12/06/magazine/forgotten-story-americas-most-famous-tool/
http://www.antique-engine.ns.ca/walworth.html