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Certo Dolly mod. B
France Version française
Photos by JFW text by Sylvain Halgand. From the collection of JFW. Last update 2012-01-30 par Eric Borel.

Manufactured or assembled in Germany from (Circa) 1931 to (After) 1931.
Index of rarity in France: Rare (among non-specialized garage sales)
Inventory number: 783

See the complete technical specifications
Chronology of cameras Certo 

Traduction de Manuel M

This Dolly is smaller than “automatic” Dolly. The formula used here is of a folding camera close to a klapp. It is necessary to get out on the front plate to unfold the bellows and so that the lens achieves correct focal length.
The viewfinder informs immediately about the size of the image.

The characteristic of this camera is the mode of adjustment of the distance. A bored stem of a hole is fixed at the ring of focusing. The hole does above numbers engraved on a curved index on an ivorine plate. The system ensures a very good readability of the distances and a facility of focusing, but on condition that looking at the camera by the front.
 

Certo Dolly mod. B