I love '89s, and that's a great one.
Still have my great-grandfather's 10-bore w/32" "compressed steel" barrels. It was set up (not at the factory) as a "ball and shot" gun with one barrel marked "Choke" (about IM) and the other "Ball" (w/no choke), and rechambered for the then "new magnum" shells (2 7/8" instead of the then-standard 2 5/8"). It's marked "MAGNUM" on the water table, not a factory marking, and has a little rifle sight dovetailed into the rib to match the front bead for shooting "pumpkin balls" which you could get in any guage including .410 back when this gun was made in '92. I have a couple of those loads but haven't shot them; it shoots well with handloaded 2 7/8" shells but I don't like the extreme drop in the stock; we shoot with a different style than they did back then, and our factory loads are MUCH hotter than theirs, guage-for-guage.
Does yours have "compressed" or "Ordnance" steel barrels (field grade) or twist or Damascus (grades 2 and 3)?