Canon F1-N Brochure & Specs page 56

23 REWINDING THE FILM
Notes
If you are not sure the rewind lever is engaged, or if you have accidentally
engaged it, gently press the shutter button and the lever will pop back up.
The frame counter does not count backwards as you rewind the film.
The frame counter will return to "S" and the rerwind lever will automatically
disengage when you open the camera back.
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