THIS JACKET WAS ISSUED TO ME IN FEBRUARY OF 1971. NEVER WORE IT OTHER THAN IN BASIC. I WAS A FLIGHT CREW MEMBER AND WORE FLIGHT CLOTHING. SIZE IS A MEDIUM-REGULAR. THERE IS NO SIZE TAG. IT MATCHES UP WITH ANOTHER FIELD JACKET I HAVE ON. IT DOES HAVE MY INITIAL AND LAST FOUR. I WAS 6 FOOT AND WEIGHED ABOUT 150 POUNDS. MY GUESS IS THAT IT WAS MADE IN 69 OR 70.