The Rally Dry Shaver
What you’ve uncovered is the Rally Dry Shaver, a fascinating piece of shaving history. It represents an era of shaving innovation that, unfortunately, never gained widespread popularity.
A Unique Design
The Rally Dry Shaver was a miniaturized lawn mower designed for shaving. You would roll it over your face, using its toothed cylinder to cut hair.

Source: Reddit
Breaking Tradition
Unlike traditional wet shaving tools, such as straight razors and safety razors, the Rally Dry Shaver offered a lather-free experience. Its unique rolling cylinder mechanically sheared the hair, deviating from the standard blade-cutting method.
Why It Didn’t Last
Though it was a new concept, the Rally Dry Shaver didn’t catch on. Safety razors and electric shavers proved more effective, offering closer, more comfortable shaves.