The Polaroid Sun 660 Autofocus is a 600 series instant film camera with sonar auto-focus (the beautiful golden disk beside the camera's lens).
It's a very reliable and easy to use camera. In test shots it focused and exposed quickly and accurately. Be aware that Polaroid's sonar auto-focus system needs a clear path to the photo's subject to work correctly (so it's not ideal for taking pictures through windows however there is an autofocus cancel button that works well for distant subjects).
Condition notes The camera is in good aesthetic condition except for some very minor wear on the body (see photos). The camera is functioning correctly; it was tested with a film pack.
Built-in electronic flash (1/3000 of a second)
Sonar auto focus
Automatic focusing system with a fixed front lens and an internal rotating disk with four lenses
Automatic variable speed/aperture shutter system (speeds range from 1/200 to 1/3 of a second; apertures from f/10 to f/45)
Flash override button
2 to 14 feet flash range for indoor photography
Automatic fill flash for sunny outdoor photography