This is an excellent example of a extremely rare early Mauser Model 1912/14 prototype, semi-automatic pistol chambered in 9 mm Luger. Originally these were based on the smaller 1910 pattern Mauser pistol only scaled up to use the larger 9 mm Luger cartridge. It is estimated that fewer than 200 of these pistols were ever manufactured with even fewer known to exist today. The sales record from Hans Tauscher list approximately 8 being sold in the U.S. in the 1914-16 time frame. This specific pistol (serial number 166) is listed as being the highest known pistol in any collection today. The left side of the slide is marked "WAFFENFABRIK MAUSER A.-G.OBERNDORF A.N. MAUSER'S PATENT". The full serial number "166" is stamped on top of the rear section of the slide, directly below that on the rear of the frame, the back side of the magazine and various other parts including the barrel, takedown latch, trigger, side plate and slide release. Internal parts have the partial number "66" with the grips being unnumbered. The pistol was finished in a high polish Mauser blue on the major parts including the barrel latch, safety lever, trigger and rear sight. Some internal parts have a Mauser heat blue finish. The magazine is nickel plated exactly like the earlier 1912 humpback model pistols. It is fitted with a one-piece checkered wraparound walnut grip. It is complete with its original and matching (numbered 166) magazine.

Excellent with 98% plus of the bright original blue finish overall with some extremely minor high spot wear only. The various smaller parts retain 98% of the original nitre blue finish remaining overall. The grips are also in excellent condition overall with some minor handling marks on the back and sides with nice distinct checkering on the sides, mixed with a couple of handling marks/light pressure dings present on the lower grip. A wonderful example of a super scarce very late production Mauser Model 1912/14 pistol.