The Cartridge Premo No. 2A camera was manufactured by the Eastman Kodak company form 1916 to 1922. They were designed as a simple box camera that took regular Eastman N.C. film cartridges. The camera has a meniscus achromatic lens and two shutter settings of B and 1/50th of a second depending on the age of the rotary shutter. The “B” mode is engaged with a slide lever on front of the camera that you toggle up and down. When you push the lever up in the “B” position, the shutter release will keep the shutter open until you switch it back to where you started in either direction. The shutter release also has no double exposure protection and it is possible to take multipole exposure on the same frame. It also has a pull tab on the side of the camera for the aperture setting. It’s a metal slide plate with three holes in it and you can feel a stop at each location. The instructions just call the openings “Small”, “Medium”, and “Large”. The actual apertures are close to f/11, f/16, and f/22. The No. 2A did take twelve exposures, 2 1/4 x 3 1/4 inches in size on No. 116 film. The film is no longer available but with some work you can use 120 film. Most box cameras of that era you would load from the back or the front but this one you remove the film loading frame from the side of the camera after sliding the locking release button. The camera was inexpensive and sold for a retail price of $3.50.