Crown and tube durability.

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Originally Posted by Ron P

Hi Bas,

Quick question for you: what is the criterium for replacing tube and crown?
I read once, if the crown still captures 270 degrees turn, it is oke, if it is less replace crown and maybe also the tube?
What is your much appreciated opinion?

Br

Ron

Tube is standard replacement during service unless it is gold and it damaged.

Crown, any deep scratches/dings and it is an option, if it catches hard, or only secures on a thread or two or is simply massively scratched/dent then it is not an option.

Up to the individual watchmaker to decide, within these 'guidelines'. I am usually pretty strict and often say that it needs replacement where other watchmakers might not.

[mr ling]

The threads on my Grandmother's 1987 TTDJ are crisp. She rarely wears it enough that it stays wound, so it gets a winding rather frequently.