Made by Agilux in England starting in 1949, the Agifold II was a 6×6 format folding camera. This camera has a 90mm lens, a leaf shutter and shutter speeds ranging from B to 1/300.
For metering it had an extinction meter which uses a sequence of known fractions to determine proper exposure. Here’s how it works….see the little slot at the top of the camera above the word agifold? When you look through it you see a strip with numbered boxes, 1,2,3…. pick the highest number that you can make out and match it up to the scale on the top of the camera….