This watch looks nice with an original dial and a solid 18K case, but the oscillating weight is not turning. I’m curious to see what’s happening.The nasty punch marks on the rotor is the first clue! There is enough slack in the rotor post and rotor bush to jam the rotation.While removing the rotor, I noticed there are some further pointless punch marks on the plate under the rotor gib.Here is the underside of the winding mechanism.The rest of the movement looks to be in really good condition.I have removed the balance and ratchet wheel.Base plate with only the pallet remaining. Almost perfect condition. I wonder if the “watchmaker” that made those ugly marks on the rotor has gotten this far in servicing the movement.Setting mechanism.As the balance staff is almost £50 a shot it is better Christian performs this operation.Here Christian is removing the old staff with a Platax tool.Here Christian is riveting the new balance in the staking sett.All the parts cleaned and ready to put back together.Here you can se the complete gear train back in place.Barrel and train Bridge back in place.Balance and winding mechanism back in place.Great performance with a new balance staff.We suspect that the earlier watchmaker thought a cal 550 rotor bush would fit. But this movement uses a cal 470 rotor bush and stem that are smaller. So to make the bush fit he has broached the rotor to make the larger 550 bush fit. Of course the bush is now too large for the stem so he has tried to punch the hole smaller. We have sourced the correct cal 470 rotor bush and stem. But now the hole in the rotor is broached too much. To fix the problem, Christian solders the original cal 470 rotor bush in place.Christian has performed magic with an almost perfect soldering.Movement back in the case. The oscillating weight is once again swinging as freely as the day it left the factory.A nice classic that deserved being fixed!