I see that you're saying that Vlchek made them. Do you have a source or is there a post that you could direct me to? Thanks.
It is a very interesting question, X, and one that I have remarked on before here and on other threads as well.
Vlchek's entire line of interchangeable socket wrench drive tools is a conundrum to me. I have described it as a
brief, failed foray for many reasons.
First of all, they don't appear in any early 30's trade mags or hardware store ads they I have been able to find. They seem to appear for the first (and only) time in the 1936 catalog, and the tools lucky enough to be found sparingly in dribs and drabs by collectors fit the images and description in that catalog.
They don't appear in the 1941 catalog, just 4 years later, implying they have been dropped from production, and that is consistent with WWII documentation and empirical evidence. There are NO wartime Vlchek drive tools.
They don't appear in the 1949, 1951, or 1955 catalogs. The first time Vlchek socket drive tools appear again is 1959 and they are nothing like the 30's tools.
I have to admit, their description in the "WHY Vlchek QUALI-T-BRAND socket wrenches are BETTER" write-up on page 7 of the 1936 sounds as if they designed and made them. It implies that they painstakingly made every design feature decision for a reason, and it even implies they selected the steel and heat treatments. Oddly, though, it doesn't actually directly say they made them.
Their presence in only one document (1936) and their extreme scarcity evidence a very brief production period.
They were an old venerable house known for making very high quality end wrenches, auto wrenches, pliers, ball-pein hammers, and chisels and punches, as well as the roll-up livery, "mechanician", motorist, and taxi kits they put all those tools in - with a seemingly unprecedented and quickly discontinued entry into the detachable, interchangeable socket wrench drive tools market.
The fact that Sears, Roebuck & Co turned to them as a supplier, then, only deepens the severity of the head scratch for me. They are handsome tools, that's for sure. But they certainly had no track record. (Unless their OEM did.)
In short, I have no firm position on this question except this: IF they actually made the Little Giant (WSL), Standard (WSS), and HD (WSH) drive tools themselves, it is the shortest production run of handsome, robust, high quality drive tools I have ever heard of, and with the most inexplicable stop. If they were selling why did they stop? Why would they stop?