Until I found that joke razor I wasn't aware that there actually existed a wind-up mechanical razor:
VINTAGE RUSSIAN USSR SPUTNIK RAZOR MECHANICAL HAND WIND IN CASE x | eBay

Here's a razor blade sharpener used during war times when there were no stores for new blades:
GERMAN WWII WEHRMACHT MECHANICAL RAZOR BLADE SHARPENER - DARK BROWN | eBay

I honestly wasn't aware these items existed.