The Coronet B20 seems to have been derived from Coronet's 020 box camera. The company circumvented French import customs by producing the camera in its French plant. The camera was made for type No. 120 roll film. It had two small reflecting type viewfinders. The lens was of meniscus type, but not the Coronet meniscus lens. The French box got a French lens instead, the Objectif Menisque Boyer. The camera was marked twice as "Made in France", around the lens and on the back's leatherette. The model for it, the 020 box camera, was made by Coronet in England.


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