Wet Plate Sliding Box Camera c1865 Dallmeyer J.H, London, England.
J.H. Dallmeyer, a British company, founded in 1860. Their main business was to manufacture lenses, but they also sold cameras. Some of these were manufactured by Dallmeyer themselves, some were made elsewhere, then equipped with Dallmeyer lenses and sold under that name.
Nadar invented a horizontal shutter for the camera, and concealed the camera under a black curtain
http://www.photographica.nu/dall273.htm
