It is very hard to read makers name, but I am pretty sure this is top wrench in Copes Pg 102. Lamson and Sessions , Cleveland OH
Jim
Looks like it to me.
Even my old eyes can read sessions.
My Aunt worked at Lamson and Sessions whan my uncle was in the Army,during WW2.
It was considered an excellant company here in the Cleveland Area
There is a photo of it on p 197 in Cope's. The thumbwheel is distinctive to L & S.
About the thumb wheel being "distinctive", it isn't necessarily so. I have recently seen a Whitman & Barnes WH monkey wrench with the same thumb wheel. A 6.25 - inch Sterling WH wrench, made in Sterling, Ohio has the same thumb wheel. The 7-inch Johnstone Harvester Co. wrench made by Vandegrift of Shelbyville, Indiana has a similar wheel as do the Nos. 30 and 31 WH farm wrenches made by that company. The heavy grooving on the thumb wheels of these wrenches was intended to facilitate wrench adjustments being made by frozen fingers in winter time.