Yes, Mauser made a few 8x64S rifles, very few indeed. Here are some hasty photos of the only one I have ever seen some time ago. Sorry, I have no better photos. The rifle is dated 1944 and is obviously a special order one. Built on a standard length Double Square Bridge action with special order side safety, bolt guide lug behind bolt handle and cartridge/rim guide ribs in magazine. B-type sights, A-type stock and M-type flat bolt handle.