Clockwork Shaver - A New Dry-shave Razor, worked by a spring which is wound up just like a clock, is becoming very popular on the continent. After being wound up the Razor works for four minutes and can be rewound during a shave if necessary. A built-in centrifugal regulator ensures constant revolutions..and the razor is completely noiseless. May 09, 1955. (Photo by Paul Popper Ltd.).