r/RepTimeServicesEU

I noticed my Seamaster getting fast around +34s/day to max +90s/day when on the wrist after full wind. As soon as I put it down it normalises and gets back to measuring time accurately. I suspected rebounding from kinetic energy of the wrist while fully wound in the post I wrote after noticing this issue HERE [LINK]

I throw it on the timegrapher and my readings from 6 positions indicate abnormally high amplitude. What are my next steps in diagnosing the issue? Could it be the A8800 movement coming bare dry from factory or should I also look elsewhere for a conclusion?

(attaching the timegrapher readings, to indicate watch position on each picture I used a little bronze figure in the bottom of the timegrapher)

POSITION	RATE [s/d]	AMPL [°]	B.E. [ms]
CH (DU)	3,7	345	0,0
CB (DD)	3,6	330	0,0
3H (CU) 9 Down	-2,6	312	0,3
9H (CD)	0,8	321	0,1
12H (CL) 6 Down	-4,0	329	0,1
6H (CR) 12 Down	6,7	305	0,0
average	1,4	324	0,1
delta	10,7	40	0,3

After 6 months of rather infrequent wear of my VSF Submariner 126610LV I gave it a shake and heard metallic clanking inside. Pulled the crown immediately to stop the otherwise accurate movement. Suspecting loose rotor I opened it up and used that special triangle screwdriver to remove the rotor screw to find its flange had already separated. Removed both sections of the screw and the rotor to prevent any further damage. Ordered replacement rotor screw on AliExpress. It should arrive within 2 weeks.

As I researched this topic, it came to my attention it might be caused by overtightening the rotor screw. Would you recommend screwing lightly and putting a dab of purple low-strenght Loctite on the rotor screw instead?

How can I prevent this from re-occuring?

Or withAPSF/ZF. ZF uses same movement as apsf I think so any review on that is also welcome