I ended up with the Marlin 90 on an excellent deal. (The owner knows me as one of his pastors and was giving a church donation, really, so I grabbed a pistol case and a shotgun case to give him some more profit).
Anyway, here's the gun: Marlin Model 90 over under, 20 gauge. 28" barrels, single trigger. Choke is likely modified/full (I don't have a choke gauge, but a set of calipers at the muzzle and a couple of charts, suggest it.)
I'll have to put on a new butt pad and am thinking to get the chokes opened up to IC/modified.
If I get time, I'll try to put up some pics.