Originally Posted by OldK22

Jimmy - you did not say if they are 20 or 30 round magazines. If I remember correctly the early Colt 20 round magazines had a metal follower and the Colt marking on the base plate was different (either larger or a smaller "COLT" ). The finish used on the magazine body has changed over the years. The early ones had a finish that when worn and used was burnished yellowish gold.