jbc, I believe he is looking at vintage injector blades, not vintage injector razors.
As such, it can depend. I am not certain what 1950-1970 era injector blades were made out of, especially the earlier in that time frame you go. If they were carbon steel like many of the vintage DE blades then most people would say to forgo using them because they likely are over-oxidized and the edge is ruined. If they are stainless like most modern blades then they may still be decent depending on how they were packed and the likelyhood that again oxidation has affected the cutting edge of the blade. Personally I wouldn't use them, though some people have claimed to have success with vintage stainless DE blades.
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