I have two that are rare. First, Marlin 39M Octagon, only made 1200 of them and only in 1973. Second is a 1951 Marlin 39A "peanut" rifle, only made with brass "peanut" insert for HALF of 1951 due to brass needed for Korean War effort.
those both sound like great guns buddy. Im not familar with the peanut rifle. never seen one