"Harnessing Magnetic Energy" to sharpen a knife -or a razor blade like in this ad- by re-aligning the steel molecules at the edge. This ad just ticks all the right boxes: big words, dubious claims, a quasi-magical product with no competition and the promise of lots and lots of money.
"The most efficient shaving aid ever invented" seems to be just another direct sale scam. But the 1930's art is pretty sharp. Pun intended.
"Sharpen razor blades", 1931
-click to enlarge-
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