Hi.
This is my first post on the forum. I'm started to gain interest in older Omega, especially with the 5xx series movements. Beautifully made! But I have a small problem with the center second adjustment of a 565. If the tension spring is too loose, the seconds hand move erratically, bit how tight can it be before it affects the oscillation of the balance? Can someone post a copy of the tech bulletin for this caliber, or a similar in the same family that covers this?
Thanks,
Ketil