FAIRMOUNT CLEVE. wrench

[cgw2also]

 Another pawn shop junk box find that I would like to get some info on. Wrench has no markings except FAIRMOUNT CLEVE. on one side, no sizes, nothing about forging or alloys, etc. Ends measure out with my digital calipers to be 19/32 & 21/32 but I think with the wear I see in the ends it must have been new a 9/16 & 5/8. Any thoughts on when and the type steel would be appreciated, the where is pretty well determined. Please see attached. TIA for your help. Newbie Charlie still learning.

[mikeswrenches]

Charlie, if you take a look at the Alloy Artifacts site it will give you some information.

Mike