Victor,
I hope you have not taken my posts negatively.
My matter-of-fact answers could be construed as cold and clinical (it is my engineer brain).
Please accept my apology if I offended you.
When it comes to vintage passion, there are few forums that have a Blomman, Crown Comfort and Amanico contributing regularly.
In time, you will find these three as a tremendous resource in your journey of vintage GP.
I recommend a daily visit to see what pops up!
Vintage watches are like vintage cars.
Somewhere along their life, someone has probably changed a part here or there.
Finding a true survivor is rare.
Be patient.
Wishing you the best in your journey!
Sincerely,
John