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I don't know what else to suggest. My reference shows the tech was made from 1939 through 1973. The quarters were added in 1951.
I have no idea when the ball end handle was introduced. English...

It's a Gillette 'Ball End' Tech. A very mild razor.
Techs had a very long run, from the late '30s through at least the '60s, perhaps into the '70s. They came with a variety of handles, yours is...