Originally posted by LesDMess
Before you press the release button, do you first take up the film slack with the rewind lever and hold it in place before pressing the rewind button?
I have taken a few double exposures with my Spotmatic. As LesDMess suggests, taking up the slack by turning the rewind crank helps. On the Spotmatic, you take a double exposure by pressing the rewind button on the bottom of the camera to disengage the film advance mechanism, before cocking the shutter. The film advance has a tendency to move the film a little bit, even with the rewind button pushed.
I must admit, though, that in the few (deliberate) double exposures I have taken, I was never too concerned about the film being registered at exactly the same position between shots.
I was always more disappointed by the fact that I had to sacrifice the next frame, because it typically takes the film advance about half a frame to re-engage, so the next frame is only advanced half a frame. You must then advance another full frame to make sure that you don't inadvertently get a triple exposure.
---------- Post added 11-15-2020 at 07:59 PM ----------
Originally posted by LesDMess
I reckon they were cheap cameras and many decades later - even with a lifetime warranty, something has to give . . .
But with a lot of luck, there is always a chance to find one that works. Except my buddy didn't have the meter that attaches on the top. So I guess mine is a Match-Matic
less version . . .

Yes, that is definitely a C-3 Matchmatic.
The selenium meter would be long-dead by now, anyway.