The No.2 Brownie is significant in that it was the first camera to use 120 roll film. It started production being made of leatherette covered card and, from 1924, changed to a metal box. A very simple camera with a very dependable shutter shutter. It has two sliding mechanisms on the top, one for a bulb, or time setting, and the other for a choice of 3 apertures. It also has two small reflecting finders for vertical or horizontal shots.
Description courtesy of https://www.brownie-camera.com/53.shtml