AH HA!
Thanks TW. It really is a Mossberg 472. And there are some cool videos on-line about takedown and upgrades.
I thought there was something different about it. I've only handled/shot W '94's and seen Marlins in the store. Totally forgot about Mossberg. Take down is real easy. One big difference in Mossberg is the trigger assembly is part of the lever. The safety is nice, you can lower the hammer without worry.
Now darn it. Instead of a just any old beat up gun, I've got one of some historical, though not monetarial note. Do I clean it up? Just stash it in the safe? Many why could it just have been an ordinary beater?