Hi Gary, We were still using envelopes that were marked War Department way into the late 50's in the Marines....kept using all the old stuff till we ran out...cannot go by forms in the Military. They used to always use up the old before ordering new, think we finally ran out of those about 1959 then got the new ones that said, Department of The Navy, U. S. Marine Corps or words to that effect. My dad was in the Air Corps as he always said but I will have to look at his discharge to see what it says...he was on Ie Shima, the small island off Okinawa where Ernie Pyle was shot and killed... Bill