Walther Model 2
The Model 1 was followed in 1909 by the Model 2.
The Model 2 was an improved Model 1, also chambered for the 6.35mm Browning.
On the Model 2 the slide fully encloses the barrel, and ends in a knurled barrel bushing. The knurled bushing serves as both a take down latch and the mechanism by which the recoil spring is retained in the slide.
This model dispensed with the earlier crossbolt safety in favor of a lever located on the left side of the frame.