I'm not really a "Stanley man," per se, but I am a J.P. Danielson man, and I have to admit I was scratching my head about this 8" No. 1536
Handyman-branded adjustable crescent-type wrench for quite some time today.

It's not old enough for that "X.9.7" date code to refer to 1937 and I didn't think Stanley was even offering tools like adjustable crescent-type wrenches back then, anyway. Conversely, it doesn't look modern enough for that "X.9.7" date code to refer to 1987, theoretically made by Stanley Proto Industrial Tools, the conglomeration that occurred when Stanley acquired the Proto Division from Ingersol-Rand in 1984. So I did some snooping on IA/ITCL.
The earliest Stanley catalog I can find with what they called an "Angle Wrench" is 1960.
It appears in the 1969, 1971, and 1974 catalogs as well, more or less looking very familiar.
Which leads me to conclude that PTII and Ingersoll-Rand in turn were supplying adjustables to Stanley long before Stanley acquired the whole company.
I don't pay too much attention to hand tools after the 50's, but that makes sense, right?