A lot of us have had these, and they're great shotguns. A JMB design, very similar to Browning's A-5.
A few parts interchange, like the springs and friction pieces. A new set will extend the working life by generations.
Not big hits on the collector market. Good "Using" 11s got for $300 or less around here.
A couple caveats....
These are strictly lead shot only, unless you like paying premiums for bismuth.
Many are choked quite tightly, so you're losing spread but gaining excessive density at medium range.
And while a few of these have been converted to 3", you're better off sticking to 2 3/4" fodder.
I had one, a family gun with Polychoke. I couldn't hit squat with it. A cousin has it now and loves it.
I suggest taking yours to a good smith. Browning's designs work very well, but are of complicated design and tight tolerances. Have the smith clean and lube the action,possibly for the first time ever, and check for damage to the fiber buffer at the rear of the receiver. New ones are out there if the buffer's history.
Have the smith show you how to set it up for light and heavy loads. Practice a few times until you have it nailed.
Now go shoot it. In your Dad's memory if nothing else. And enjoy.....