A multiple exposure switch is built in. There is an ISO dial which can be set to any film speed from 6 to 6400 (in 1/3rd increments). The MFB-1 film back accomodates the standard MFB-1A 120/220 film insert. The film back has a dark slide pocket and a memo holder. The MFB-1A Film Insert features a rotating pressure plate for changing the film from 120 to 220.
The free polaroid back is in perfect working condition as are the backs. The item "Contax 645 MFB-1 120/220 back, MINT (3).
FREE Polaroid back, Oregon USA" is in sale since Wednesday, June 14, 2017. This item is in the category "Cameras & Photo\Film Photography\Film Backs & Holders". The seller is "proptd" and is located in Clackamas, Oregon.This item can be shipped to United States.