All carry the inscription "A Mutoscope card." They were sold from coin-operated vending machines in places such as amusement parks. Most Mutoscope cards are of pin-up material, but some featured other kinds of images such as Jimmy Hatlo cartoons.
The cards, all bearing the inscription "A Mutoscope card," were sold from coin-operated vending machines at places like amusement parks.  Most of these cards displayed pin-up imagery, although some featured different kinds of pictures, including Jimmy Hatlo cartoons.