In late 1963 the postwar military model P1 was adopted for use by the German military, identifiable by the P1 stamping on the slide.
The postwar pistols, whether marked as P38 or P1, have an aluminum frame rather than the steel frame of the original design.
Starting in June 1975, the aluminum frame was reinforced with a hex bolt above the trigger guard.

During the 1990s the German military started replacing the P1 with the P8 pistol and finally phased out the P1 in 2004.
In late 1963 the postwar military model P1 was adopted for use by the German military, identifiable by the P1 stamping on the slide. The postwar pistols, whether marked as P38 or P1, have an aluminum frame rather than the steel frame of the original design. Starting in June 1975, the aluminum frame was reinforced with a hex bolt above the trigger guard.
During the 1990s the German military started replacing the P1 with the P8 pistol and finally phased out the P1 in 2004.
Walther P38