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- #21
There is only "Pat No 3071856" printed on one side of the blade.
I believe it refers to a 1963 patent for teflon coating.
Apparently, Gillette used this patent on their blades from at least the early 70s till early 80s.
I believe it refers to a 1963 patent for teflon coating.
Apparently, Gillette used this patent on their blades from at least the early 70s till early 80s.