Been collecting Marlins for a bit now and I "believe" what you have is a Marlin Model 60W. It was a commemorative edition with a "walnut finish" standard birch stock, gold finish trigger , and a gold seal (medallion) in the butt stock that read "sportsmanship, safety ethics" and icon of man and youth shooting. It also featured a brass feed tube with a 15 round capacity.It like other post 1988 60's had "last shot hold open" feature with a Micro-groove barrel in 1:16 twist. They were a special 125th anniversary edition for the NRA (1996). Also seem to remember a small run of "Ducks Unlimited" about the same time (probably just using up the parts) with the same features and "w" designation. Most of my collector buddies dont think the "w" really means anything, but ya got yourself a nice little limited run 60 so enjoy it.