№ 3A Folding Pocket Kodak
The 3A FPK is known as a postcard format camera, producing 3 ¼" x 5 ½" images on 122 film. Kodak made many variations of the 3A FPK, but this particular example is a Model B. The serial number is stamped onto the front support foot, dating this camera to sometime between September 1903 and February 1904 (later ones have "KODAK" on the foot).
Features include a leather-covered body made from wood and aluminum, a rotating finder with level, and a Bausch & Lomb lens and shutter.
So far, this is my oldest camera. ← update: Not anymore!