I have one rifle that is stamped "L46" on the left side of the action with the serial number. Ironically, it's actually an L469, the "stretch" version of the L46 in .222 Magnum. I think it's very late production; S/N is in the 55000 range. My other L469 is marked "Sako Riihimäki" like any other L46. S/N is 48xxx. I've also been told that some of the magnums were actually stamped "L469." I've never seen one so stamped; if any forum members have one, I'd be curious about the serial number and date of production. Both L469's have the late style stock with Monte Carlo cheekpiece. I don't have a late standard length L46 in .222, but I would guess that some of those would be stamped "L46" as well as the magnums. If anybody has one, please post on how it is stamped. According to Arma Fennica, L46 serial numbers ended at 57000 and the L461 picked up at 57001. There was also a short, late run starting at 80700. It is unclear whether the magnum actions were numbered in blocks or if they were just mixed at random among the standard L46 actions. Arma Fennica states that L469 production continued through 1967, well after the end of L46 production. This seems odd, but perhaps they had some leftover actions. As we know, Sako seldom wasted any usable parts.