The Mamiya NC1000 camera was introduced in 1978. It was the smallest and lightest fully automatic 35mm SLR camera with shutter speed priority system and center-weighted TTL-metering. Manual override was possible allowing full control of every picture taking situation. The camera had electronically controlled focal plane shutter with speeds from 1 to 1/1000 sec. and featured a bayonet-type CS mount with extra wide throat. A series of CS lenses with focal lengths from 14mm to 300mm were available for the camera.
The Mamiya NC1000s camera was introduced a bit later in 1978. The main difference was more reliable shutter construction.
Mamiya CS mount lens lineup