Here's a screen cap of Otto Soglow referencing his face for an expression.
From the Getty Images archives, here are a few links to some unembeddable video clips. All of these clips are short and appear to be part of a larger documentary from 1948.
Video: Otto Soglow
Video: Harold Gray
Video: Al Capp
More here. If anyone knows what this documentary is, I'd love to know.
EDIT: Oh, here it is on IMDB: THIS IS AMERICA: FUNNY BUSINESS, part of Jay Bonafield's "This Is America" series of shorts for RKO.