OK gents, I have what I think may be new data for Wilton's early years in the form of some ads from 1942.
These are all original ads clipped from the magazines of the day, by the then VP of Columbian.
Some things that can be put to rest:
Wilton DID sell to the public (or at least to the general manufacturing needs under restrictive sales)
They started with a 1 year guarantee, but changed that almost immediately to a 5 year guarantee.
Besides the standard jaws, hey offered precision ground smooth jaws Hard or soft as well as smooth copper or brass
They sold through at least one reseller - Acme Tool Co. (look Out Roadrunner!

)
The vises met the Fed Sepc, GGG-V-436
Earliest Ad May 1942:
August 1942
From Acme, Sept 1942
Acme, Dec 1942