The Voigtlander Prominent rangefinder camera from the 1950s. To be honest there were things I loved about it - built like a tank, it had a type of satin chrome that you could hit with an abrasive wire wheel and I am sure it would not scratch - unlike Leica cameras that seemed to scratch if you looked at them.
It was solid and beautifully, if idiosyncratically designed, engineered and built.
It had a leaf shutter that was an order of magnitude more quiet than a Leica M shutter but like older Leica LTM cameras you had to cock the shutter before you changed shutter speeds (I think my memory is correct, here). Because it was a leaf shutter, photo reporters of the era were said to love it - you could use a flash and it would sync at all speeds up to the camera's maximum speed, which was 1/500th of a second (not all that fast).
It also had a fairly pokey viewfinder by comparison with M cameras (at least the model I had did - a later version had a larger finder). That tended to mean you had to use an accessory finder for all lenses - which meant that the accessory shoe was always in use.
There was also a very limited range of lenses for this camera and that made it a bit restricted. But I have to say those lenses were quite nice to use, if rather low in contrast.
It was an odd mixture of old, new and, well, just different!
But in the end its idiosyncracities were just too much - like having to turn a knob on the left top side of the camera to focus the lens. It just became too hard so I sold it as it was not getting enough use.
I loved the idea of it though and still like to look at pictures of them.