This is an extremely rare early prototype Model 1900 pistol that was produced in extremely limited numbers. This design followed after the Schwarzlose "Standardt" model and is commonly referred to as a "toggle-top" pistol. In this design, the pistol uses a delayed-blowback type mechanism (where the breechblock is not locked) where the pivot pin/toggle joint is positioned above breechblock and frame. So when the pistol is fired, the complete toggle mechanism raises up to extract the spent cartridge and then closes, strips a round from the magazine and sits on top of the receiver. This design was manufactured under patent Br.Pat. 6056/1900, and it is assumed that this pistol was manufactured only to protect this patent design; the company never put this pistol into production, and this pivot pin/toggle joint design was later used in the Schwarzlose machine gun. It is estimated that only a very few prototype pistols were actually manufactured, so that the company had a working design so that it could file the patent. It has a fixed barrel that has graceful, fast taper profile similar in configuration to the early commercial Lugers, and it is fitted with a high positioned front sight (now missing) and only a sighting line milled through the top of the toggle assembly. The lower frame/grip of the pistol is shaped just like the earlier Strandardt model, and it uses the same 7 round clip, which is inserted through the butt of the pistol. The left side of the barrel, barrel extension and the rear section of the toggle assembly all have a "double crown/U" firing proofmark. It is correctly numbered "25" on the left side of the receiver and on the base plate of the magazine. It has a beautiful high polish blue finish with a nickel plated magazine and is fitted with checkered walnut grip.

Very fine with 70% plus of the bright original blue finish still remaining overall with most of the blue loss on the right, upper side of the receiver (probably from sitting in a holster) and the grips straps. The grips are in fine condition with nice, distinct checkering on both sides showing minor handling marks and a few light pressure dents. The front sight is missing. Mechanically fine. This is a very unique and certainly a very rare prototype pistol.