Agfa, Clark, Rimelig
Fra ca. 1954-65 Collectors item. Vintage.
The Clack is a light viewfinder camera. It works great with ISO 50 slide films like Velvia, so use it while you can still get that film. Black and white ISO 50 films, and overexposing 100 speed color negative by one stop ought to be fine.
Aperture f/11 and f/12.5
Shutter about 1/30 plus B
Built-in yellow filter
Zone focusing with two steps:
1-3m (3-10 feet) with a built-in close-up lens.
3m (10 feet)-infinity with just an aperture ring between the lens and the film