Portrait of a group of holiday makers in Switzerland

A portrait of a group of holiday makers posing with the snow of a mountain behind them. This was almost certainly taken in Switzerland, and the date is in the late 1950s or early 1960s.

I'm particularly interested in the camera the chap in the middle has around his neck. It seems to be a 35mm rangefinder with a built in light meter, but I can't get a good enough image to be able to make out the model. If anyone can make it out I'd be interested to find out.