Yes, indeed. Low amplitude, large beat error, and too fast.
The movement does look clean, but there is no more oil left, and that explains the low amplitude. Note the little bridge with the two jewels holding the third wheel and the second pinion. Very nicely executed, so you press on the second hand without having to support the pinion from behind.
The keyless works have a bit of solidified grease and dirt on them, but it would be unusual not to find that.
The balance back in and ticking. The regulator only sits on top of the hairspring and holds it from above, without a boot that has to be closed around the hairspring. Saves a bit of time when removing the cock to adjust the beat error.
Now I can put the bottom plate back together. Note that the decoration and design looks exactly like on an Omega movement, and there are good reasons for that. A fair amount of Omega movements were developed by Lemania.