I was just reading the "Mag FAQ" and saw the description of the old Colt 30 round mags. They sounded familiar. I have three with the dark green followers marked 62665A and the bodies stamped 62667. The Mag FAQ stated that these mags are "rare and collectable." Any idea what they are worth?
I also have two old Colt 20 round mags that do NOT have the "UI" stamp. (I think that these are the two that came with my 1972 SP1.)