 Many P04 and P08 pistols would continue in service with German army and navy personnel throughout World War II.Towards the end of 1937 (beginning with 't' & 'u' block pistols) Mauser phased out rust blue process and "straw finishing" small parts and levers on the P08, choosing to salt blue all parts of the weapon at one time.In 1941 some of these pistols were fitted with inexpensive black Bakelite grip panels to cut production time and expense.