I picked up a Marlin 60 Deluxe, missing a trigger group and very dirty. I cleaned it up and it looks pretty good, bore came up nice and shiny, brass bead front sight. Barrel says 60DLX North Haven Ct. Serial starts with DL11, how do I date this thing? I see no letters stamped on the barrel in the usual spot? I ordered a complete trigger group for it to get it up and running. Got this thing on the cheap, hope she's a shooter.