Gillette Gold Ball End Tech.

Gillette “Ball End” Tech, likely manufactured between 1939 and 1950.

The “Tech” was a revolutionary model for Gillette because it was the first to feature a solid safety bar rather than the “open comb” (teeth) found on earlier models. The “Diamond” logo stamped on the head and the “MADE IN USA” text are hallmarks of the post-1939 production era.