Omega 55x / 552: installing automatic works kills amplitude

Knebo · September 29, 2023

19 hours ago, JohnR725 said:

Then his procedure is right except he is missing an image that you would have in the later version of the document and that might have been the reason why yours was wobbling is this image

This is indeed a useful additional information! I had actually assumed that this would be appropriate depth, also because the previous pinion was at that depth. So the wobble of the old pinion was not due to this -- it was actually wear.

As the final-final update, I can now report a successful conclusion to the service

I wore the watch for a pretty lazy working day at the office and it was fully wound at the end of the day. Great! Actual real-life timekeeping (12h worn, 12h dial up resting) was -0.5sec/day.

Timegrapher readings at full wind: Dup: +2@259°; Ddown:+11@266°; Cdown: +5@239°; Cleft: 0@234; Cup;+3@233°; Cright: -2@228°. AVERAGE +2.

Timegrapher readings after 24h: Dup: +1@214°; Ddown: 0@212°; Cdown: -1@192°; Cleft: +1@190; Cup;-14@189°; Cright: +6@191°. AVERAGE -1.

Traces are consistently clean+straight and beat error between 0.0 and 0.2ms.

Amplitude isn't super high, but fine in comparison with the Omega specifications that @JohnR725 had posted (amplitude should be above 160 after 24h in all positions. My lowest is 189°).

According to Omega, the Delta should be below 25 at full wind (I have 13), and below 35 after 24h (I have 20). My power reserve is 41h (Omega target 38h).

So, all in all, especially after all these challenges, I'm very happy.