[Leica] Multiple exposures with sm?

[Guy Bennett <guybnt@idt.net>]

>Well try it. Load some old roll and fire off some frames. Tension the rewind
>crank and hold it in position. Flip the rewind lever down and hold it down
>as well. Now advance the shutter. Sounds and feels awful to me. Two gears
>that are almost meshing fighting and slipping against each other. Long term
>outlook? Poor. Just exactly which two gears they are I cannot say but I
>would rather not find out. If you need to do double exposures with a Leica
>rangefinder get a screw-mount. They are easy to do double exposures with.
>
>John Collier


all right, john,

now that you've opened that can of worms, how *do* you make double
exposures with a sm camera? not that i've ever wanted to do it, but having
following this thread for many a message these past 2 months, i'm finally
getting curious!

guy