This is something beautiful that I have experienced also with a refrigerator.
My dear Mother bought that refrigerator years before she gave birth to me.
I finally shut the refrigerator down when it had run flawlessly for 60 years, simply because the factory warned in the manual that you have to replace certain parts in an absolute manner even when the fridge still runs.
Built like a tank
That was the motto of factories in that age. The robustness of your watch proves it also