Some quick preliminary observations…
I will definitely need to adjust the clutch, the top platter very slightly rubs against it. I did some quick reading on how to do it, it seems pretty straightforward, and I'll take care of it when I have a free moment.
The platter takes a few rotations to get up to speed, and then maybe another 5-10 minutes to get up 100% pitch from a cold start, which I believe is normal, according to to the owner's manual. Switching from 33 to 45, the speed is pretty much on pitch, but it seems to run slightly slow at 78 unless the pitch wheel is adjusted. I'm not sure why that is, perhaps the clutch is causing it to drag? I'll re-evaluate this once I adjust the clutch.
The motor and platter are very quiet, I do not hear any grinding or anything. However, I put a shot glass up to the arm board and could hear some rumble with and without the clutch engaged, probably from the motor. Once the SME arm is installed, we'll see how intrusive the noise is, but I'm thinking that some new mushrooms may be required, and possibly some work on the platter bearing.
Overall, this 52-year-old Thorens is in remarkable condition and should require relatively little effort to bring up to a high level of performance.