Canon Model 7 - Manual (Page 33)

owever, it can be done
Double Exposures
Canon Model 7 is not designed to take double exposures;
by the following steps :
1 First, turn the film rewind ring to " R ” from "A” position.
2 While watching the film transport indicator, turn the film rewind crank to the right
and stop when the film transport indicator has made about one-and-a-half turns.
3. Return the rewind ring to position "A.”
4. Wind the winding lever, and you are ready to expose for the second time on
the same film frame.
5 By repeating the same operation, multiple exposures can be obtained. By turning
the film transport indicator two-and-a-half turns, you can make a double exposure
on the film before your last one.
• When the shutter button is released accidentally with the lens cap on, the film
can be rewound by using this method.