Being oblong pins, I started tuning with a T-hanmer, but found it difficult to even turn the pins, so I torque-tested some of them, and was amazed to find that many of them were over 40 inchpounds, which is tighter than some new pianos, not bad for a piano that is 138 years old!
Tuning it was a long and back-breaking job for me, because of the angles, using a T-hammer on a piano that is too tall to sit down for tuning. I will try again with an old double-ended crank, but even the first rough tuning has transformed it, and although I am unlikely to risk raising the pitch in one go, the tone is surprisingly sweet.