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W. C. Fields as Cornelius O'Hare (gotta love the pun).

It's on Utube. Shows him honing his razor on, well, I believe that is a brick he is using.
He also shave someone later, and the famous...

"Smart Money," James Cagney, Edward G. Robinson, 1931.

James Cagney plays "Nick the barber" Lots of good views of a 1930's barber shop, and even a short scene of a guy shaving against the grain...