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Were these beasts made for cutting hair (scalp hair)?

How would they work? Are there essentially two cutting planes. What I mean is are the end of the tines sharp as well as the valleys between them and the razor would cut high and low at the same...

I tried searching around for my own answer but it is hard to find something when you don't have a clue what you are looking for! It almost looks like the predecessor to the modern electric clippers.