Thought I'd show you a couple of watches I got in a little batch recently. The first is an automatic Marvin. This has a 25J automatic movement with the rotor marked Marvin and 777. The dial's a bit dirty - but acceptable and its working well.
The other is a Helvetia. The movement is Helvetia's own 831, 17J. The dial is very dirty. Of possible interest is the logo (repeated on the back) showing a watch face embedded in a mountain range. Having googled extensively, I can't find this logo anywhere else - so perhaps it was used only briefly.
Photos a bit poor, sorry.