Specifications

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* The mirror lock-up lever must always be oriented horizontally
except when it is being used to lock up the reflex mirror.
In one 360° clockwise rotation, the winding crank will advance the
film one frame, and at the same time, cock shutter. The winding
mechanism ratchets freely in the reverse direction, allowing short
strokes to accumulate a full wind. In either case, winding action stops
automatically when complete.
The exposure counter is an additional type and shows
the number of frames exposed. Starting from "S", the
exposure counter for 120 roll film shows numbers
from 1 to 15 while the counter for 220 roll film shows
numbers from 1 to 30.
6. Film Type Indicator Frame
Upon loading the film, tear off the end flap from the empty film pack-
age and insert it in the film type indicator frame. This will help you
keep track of the film loaded in the film back and should prove useful
when two or more film backs are used, with different types of films.
Rotating the film winding crank once, in the forward direction, will
advance the film one frame and, at the same time, cock the shutter,
with the winding action stopping automatically. Or, short, rapid
strokes, up to an accumulated full rotation, will also do the job.
7. Film Advance and Shutter Cocking
8. Exposure Counter