Mamiya 7 II - Manual (Page 18)

Before Loading the Film
Setting the film type
Memo clip
This camera can use either 120 or 220/135 film. To set
for the type of film used, simply rotate the pressure plate
in either direction of the arrow until the white dot is at
120" or "220/135".
When set, "120" or °220/135" will appear in the small
window under the memo clip on the rear of the camera.
The number of exposures on the film counter is auto-
matically set at 10 for 120 film and 20 for 220 film,
according to the position of the pressure plate
.
This memo clip on the back cover is used to hold the
film box tab to serve as a convenient reminder of the
type of film in the camera or for recording other data.
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