This is my oldest digital camera, the Kodak DCS 460c.
It was introduced in 1995 and uses Kodak's «M6» CCD sensor which measures 28 x 19 mm (1.3x crop). There is only one sensor speed: ISO 80. The sensor provides 3060 x 2036 pixels (6.2 Mpx). In 1995, the DCS 460 was the highest resolution digital camera available. It is based upon a Nikon N90s body, but the detachable Nikon film back is replaced by a special digital back from Kodak.
It still works great, and I use it on a regular basis.