The initial patent for what would become the Bergmann pistols was actually a delayed blowback mechanism, and it was quickly revised to simple blowback by Louis Schmeisser. The first actual production pistols, designated the No.1, used this plain blowback system.
This initial Bergmann-Schmeisser design’s notable features include loading via 5-round Mannlicher type clip, a recoil spring located under the barrel, and a unique birds-head style grip. Note also the bolt guide rail on the left side of the pistol.
Very few of the No.1 pistols would be made before a number of significant changes were made, resulting in the 1896 pattern, including the No.2, No.3, and No.4 pistols.