This camera is the No. 3A Folding Pocket Kodak, a folding bed camera introduced in 1903. It was used for making exposures in 3¼×5½ inch postcard format on type No. 122 rollfilm. This film was first introduced for use in the 3A FPK and was available in four, six or ten exposure lengths. It was made of Aluminum and covered in fine seal grain leather, with a leather handle. This particular model was sold until about 1915.
The text on the camera says the following:
DIOMATIC No 1
KODAK ANASTIGMAT F-77 170mm NO 15006
Eastman Kodak Co Rochester NY
No 3A Autographic Kodak Model C
Kodak produced seven variants of this camera: these include the B, B2, B3, B4, B5, C and G models. Earlier variants were rather expensive, utilizing a combination of Kodak Automatic shutter and Rapid Rectilinear lens (to reduce radial distortion). Later, more moderately priced versions utilized the Ball Bearing Shutter (a multi-blade leaf shutter). One exception to this were the models that used a Compound shutter with Zeiss Kodak Anastigmat (a lens corrected for spherical aberration, coma and astigmatism), naturally proving to be more expensive.