Ah, life before the Xerox machine.

LETTERS COPIED AT HIGH SPEED

Copies are speedily made of correspondence and other business records with the aid of a new photographic duplicating machine. Through its use, a letter may be photographed directly upon a sheet of specially sensitized paper, requiring an exposure of only a fraction of a second, and developed at once in a portable darkroom. The instrument is especially designed for libraries, banks, insurance companies, and others requiring frequent duplication of card records and correspondence.