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I've said this many times, but those later Omegas (500 series onwards) have finer pivots are are more susceptible to suffering from the effects of dirty jewels as there is less torque going through the train. However, you mentioned it runs fast, so I would also look very closely at the action of the hairspring to look for any irregularities. Could be bent or magnetised. Is the amplitude the same DU and DD?

I can confirm this - see the thread "Omega 613 low amplitude solved. Don't forget to check this jewel is you have low amplitude". A dirty balance hole jewel was enough to knock the amplitude down from 270 to 190 deg. BTW there's no listing for 522 on Ranfft - do you mean 552 ?

Seiko use to recommend you have your watch serviced I think every 5 or 7 years. The servicing recommended replacing the barrel as a single unit. That is why with Seiko barrels they are not designed in the same way as others. You are not supposed to open them. Today because the units are obsolete, you have no alternative but to open and service, like any normal barrel. If you look after your watch and have it serviced properly by the recommendations then the problems you have pointed out should not happen.

I agree with ecodac and add oil on pallets is no more than contamination and if dreid out , pallet profile is altered. Cleaning the escapement wheel and oiling the pallet is contaminating both.

Hi Weasol, I had a similar problem a little while ago with low amplitude on an old Everite watch. I re-cleaned the pallets and pallet bearings in Acetone to completely remove all oil and re-assembled with NO lubrication to the pallet arbors. Result was a further approx 60deg balance amplitude. Old Hippy advised me to do this. I used 9010 the first time and I think that it is a bit sticky !!. Just saying.

I am not liking the arch in that spring. It seems to me that the double bend at the base near the screw hole is what is supposed to be supplying the tension.If it were my money, I would flatten that spring a bit , making it effectively longer. it would overshoot the cog and not catch.i would do my bending at the base.