My Dad used to own (probably still does) a Welta Penti. This was an East German half frame camera that used fast load 35mm cassettes. This was a pretty daft idea where film was coiled up in one cassette and pushed out of this and into another when you advanced the film. Not sure what the advantage was supposed to be, but the disadvantage was that the film strip was pretty short, so the camera only took 24 exposures, even half frame. The cassettes were discontinued many years ago so you have to load your own which is a minor nuiscance...

The good points were that it was very pocketable, the humble Meyer Trioplan was much sharper than it's name or design might suggest and it was a fully manual camera with a decent range of shutter speeds and apertures. The film was advanced by pushing in a metal rod with one finger. When the shutter was fired, it popped out again. Shots could be fired off very quickly, almost like a motor wind :-)

Would be a nice buy if one pops up on ebargumbay.