The Rotary King Safety Razor Co produced this funny little thing. Known as King Rotary, Rotary King, King Oscillator, I tend to stick to the last name, as I have suspicions the "Rotary" name was for their SE razor.
The oscilating mechanism an best be explaind by the patent, which @sɐǝɹpu∀ shows here
The oscilating mechanism an best be explaind by the patent, which @sɐǝɹpu∀ shows here
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