These are very unique rifles with the non-rotating bolt and many other unique design and engineering features.
Sauer produced this as a model 80 for European consumption and then continued this line of rifles (not marked with Colt) as the Sauer model 90 & 92 up through 2006 - the 90 & 92 used the identical action as the original but made some styling modifications to the stock and trigger guard areas and offered some other calibers and stock finishes as well.
Some basic information:
Total rifles produced: 27,189 - serial numbers from CR1000 - CR28189 from March 1973 - July 1984.
4 variants - Short action (22-250, 243 & 308) - Medium action (25-06, 270 & 30-06) - Magnum action (7mm, 300 Win, 300 Wby & 375 H&H) - Safari magnum in 458 Win only.
Rarity - 22-250 rarest in the short action - 25-06 in the medium action - 375 H&H in the magnum.
The above statistics are courtesy of the Sauer factory historian, Lothar Wiegand, as of the end of 2007 with the persistence of Tom in WY