how often are chrono pushers replaced? (wear and tear)

[taxico]

i understand pusher gaskets are changed during a routine service.

and i know RSCs will likely change old pushers with new ones if the watchmaker thinks they may be slightly suspect.

but in the real world, if a chrono gets used regularly (say it starts, stops and resets 3 times a day, every day), how quickly will pushers get worn out on the inside?

and a side question: thread/tube wear aside, does the crown/stem wear out faster than pushers in normal use?

i'm trying to cut down on a parts i hoard and wonder if i should be letting go backup crowns and pushers for my vintage chronographs...

[chaw6125]

I have no idea but if they are vintage I wouldn't sell the parts. They are only going to become harder to come by.

[Porter]

I've just changed crown and pushers in my TAG CARRERA CV2110. Is not an old watch and pushers took 5 months to arrive!!
Don't sell your vintage parts! Will be a treasure in the near future! IMO.

[taxico]

thanks! i'll keep them and reject the tempting offers i've got...