Can anyone shed any light on this Walther pistol I inherited? I got it from my dad after he passed and he had gotten it from my grandad. The pistol is in very good shape overall with holster wear mostly at the muzzle end. I’m curious as to what the value may be on it and how old it is. It is marked with a K after the serial number. It has 2 magazines both marked Walther. Thank you.