What film format did the Kodak Brownie Number 2 first use?

The Kodak Brownie Number 2 first used 120 film.

Introduced in 1901, the Brownie Number 2 was the first camera designed for the 120 roll-film format. Kodak created the format for affordable amateur photography, pairing a simple box camera with inexpensive film that ordinary users could load and send for processing.

The 120 format is medium-format roll film, wider than the 35 mm film later associated with compact cameras. It uses a paper-backed roll wound on a spool, and classic cameras read frame numbers through a small red window on the back. Depending on the camera, 120 film can produce several image sizes, including 6×6 and 6×9 centimetres.

The nearby 620 format is a common source of confusion. Kodak introduced it later, in 1931, using film of essentially the same width but a different, narrower spool. The original Brownie camera, released in 1900, used No. 117 roll film; the Number 2 made 120 the landmark format associated with its model.