Same, EJ but my threads corroded.
I have a 1954 Gillette tech where the threaded post corroded and broke. I have made a temporary repair by drilling out the post and setting a 1/16" drill bit using epoxy.
Even though it's supposed to be brass, I'm pretty confident this is a zamac top cap. When I drilled out the post for the repair, the metal flakes were silverish, not golden colored.
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Interesting. I thought that year tech was plated brass. I have several techs from 1960 and earlier and I'm fairly certain they are brass. They seem pretty indestructible.