Here's a Centurion Ironman Master with Shimano 600 group. Appears to be a 1989 gray smoke, but I'm not sure. Looks pretty good, although the hoods are missing. Same seller I bought my '89 Ironman Expert from in June, and my Univega from last year.
Tempting, but I don't really need another and don't have the room.
I might visit the seller to take a peek anyway, in part to check out the drivetrain to compare with mine (I've mentioned before it seems like my Expert's drivetrain drags a bit from excessive rear derailleur tension). He also has a nice looking Accordo which might make a comfortable alternative to the Centurion for days when my neck is aching.