In practice what the preceding means is there were probably no more than a dozen U.S. media companies that could produce the required War Production Board shellac documentation.

The Big 3 of Capitol, Columbia & RCA owned a combined +90% market share. Independent producers like Asch, Keynote and Stinson didn't own record presses. They contracted mostly with one of two independent east coast record pressing companies.

Early on, Asch Recordings/Records split their business between Scranton Record and the aforementioned Clark Phonograph Co. The latter is an oft listed creditor in the Asch bios.

When the Stinson record label finally does make an appearance in this thread, Clark Phonograph will be getting the manufacturing credits.

There is even a bit of discography folklore that claims Prince Igor, Asch Records, S-800, 1945 is the first 'vinyl' recording made for the retail market. If true at all, probably a Stinson Trading Company fugace-semi-bootleg pressed after the split-up and probably made of Formvar or some other early vinyl attempt, not Vinylite per se.

But….definitely the sort of 1940s advanced materials science stuff the FBI had been arresting Soviet spies for, btw (see Keynote, above.)