Mamiya NC series
The NC Series
NC Series from Mamiya is part of their long discontinued series of 35mm SLRs. This series had two cameras in it: NC 1000 and NC 1000S. They had a bayonet mount (CS mount) that was different from other Mamiya bayonet mountings. Lenses for this series are still available and can be found on Ebay at regular intervals.
There was a name variant of the NC 1000, sold by Sears and called the Auto CS 1000MXB in black and Auto CS 1000MX in chrome.