If you mean a Krieghoff P code, well, its not the same as you called the others....
I assume you have other books?
Kenyon, Walter, any of Jan Still's?
No offense, but what differences are you talking about?
To go into detail would require the above books
and a search of some of the above would show you much;
Mauser production
K date
G date
1936
1937
1938
1939
1940
1941
and all of those have many variations.....