The Contax G1 is a 35mm rangefinder that use the "G"-mount, an electronic autofocus mount. Critics were quick to accuse the camera of not being a "true" (mechanical) rangefinder, since it used autofocus and electronically-linked mechanisms. But the AF mechanism in the G1, and later the G2 (introduced in 1996), does indeed use a twin-window system much like that of the older mechanical rangefinders—only in electronic form. An advantage of the Contax G finders over other rangefinder cameras is the fact that with lenses from 28mm to 90mm they always show the correct view (zoom rangefinders). The same is true for close focusing, as they also feature parallax correction.
If you want to know more, Camerapedia has written a small review.
The camera, cap, strap, papers, and box.
Cosmetic: Overall good condition, with some signs of use.
Optical: Viewfinder clean.
Mechanical: All shutter speeds are accurate and all mechanical functions are working.