Saturday, May 18 2024 -- Anderson Plywood Tool Swap Meet -- part 12 & Last - Plomb #1137 25/32" & 11/16" box end Wrench

Someone ground off the Plomb name.
Don't know why.
My guess is that it was to distinguish the owner's tools versus others also working in the same shop.
Often, professional tools have some sort of mark on the owner's tools to keep them from being mixed up with other people's...