
Will this type of cracked jewel cause me issues?
I’m in the process of restoring a Jean Cardot and noticed the Incabloc pivot jewel is cracked.
I haven’t replaced one of these types of jewels yet, I will give it a try, but before I do, just wanted opinions if this crack will greatly affect performance? Could I just leave it or should I definitely replace it?
It’s for the underside of the balance wheel.