Let's see the entire internal mechanism.MAYBE a member of the Sutter family in Ruffsdale,Pa who were active in the early 1960's
I knew W.G.Sutter and he made bench crafted locks and used the torsion bars from Chrysler and Packard to make tumblers.
This is only a guess from a memory of a long ago time.The thick mainspring hook looks like Sutter's as I remember them.
Bob Roller