we're playing it by ear

we inherited an upright piano tonight.
i've been playing piano for half my life, but have never owned one before. i'm excited.
the previous owner, one generous Jim Lucas, said "it's a banger" -- and true, it needs some cosmetic work and tuning ... the A below middle C hammers both A and A-flat. And the low D is tinny. But it brings me joy to have it in our little home.
the previous tuner left little pencil notes on the interior -- it seems the last time it was tuned was in 1986. It has a split bass bridge, whatever that means. I'm gonna go do some research now. It's a Baldwin Hamilton.