120 is a film format for still photography introduced by Kodak for their Brownie No. 2 in 1901. It was originally intended for amateur photography but was later superseded in this role by 135 film. 120 film survives to this day as the only medium format film that is readily available to both professionals and amateur enthusiasts.
Original 120, 620 and modern 120 film spools with modern 120 exposed color film
A portrait of a dancer photographed in 6X9 format on 120 film
Image shot on 120 film
Pentax 6×7 SLR camera with perspective control lens
The Brownie was a series of camera models made by Eastman Kodak and first released in 1900.
Kodak Brownie No.2 Model F (1924)
Kodak Brownie advertisement
Brownie No. 2 (1901–1935)
Kodak Brownie No. 2A, Model A (1909-1911), used by Bernice Palmer aboard RMS Carpathia