Sure would like to know the era or dates of these cameras. Since they seem to be of the same form and used the same technology they must share a similar period. Its a marvelous series of now very unique and rare (I am sure) cameras. Thank you.
Thanks for your comments, jamest and BOBWED. I would like to know more about these cameras too. This camera is Gauthier camera. Shutter speed is T, B, 25, 50 100, 125. Lens - Trioplan 1:4,5, F= 10cm. More - in http://camerapedia.wikia.com/wiki/Gauthier