New-old stock (NOS) watches-- do the movements need servicing?
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  1. #1
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    New-old stock (NOS) watches-- do the movements need servicing?

    Say, a 10-15 year-old watch with automatic movement that's essentially new, maybe worn a couple times but is otherwise in near-pristine condition. The parts of the movement obviously haven't moved around a lot. Do the oils in watches like this really congeal and thicken because the parts aren't moving? Does a watch in this situation need a servicing?
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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    maybe yes, maybe no...............if it's not running properly...keeping good time etc. it needs a service...if it works right....you're good to go!
    Remember the "curmudgeon's" 1st commandment..."if it ain't broke, don't fix it"
    & the chant....BAH HUMBUG

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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    Yep, that do, if you buy one have it serviced right away.

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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    When it comes to vintage or NOS watches, let the First Commandment be:
    If it ain't broke, don't fix it".
    Amen.
    stratct likes this.
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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    That First Commandment will for sure create a need for extensive repair and service!

    Yes, it need a good service. The very important oils have aged, changed viscosity or even dried out. Or moved to a place where they should not be.

    Of course, the damage caused will not show for a couple of months. After that, you will need far more expensive service and repair than if you did it soon after purchase!
    Would you run an engine that has been standing still for lots of years, with the original oil?

  7. #6
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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    I'm going to fall back on what my watchmaker told me, and say no for a wristwatch and yes for a pocket watch.

    His reasoning (works for me):

    With a dirty wristwatch (or one requiring a service due to old lube), using a rather weak mainspring, the watch will stop before any damage is done to the movement.

    On the other hand, with a pocket watch that uses a much larger/stronger mainspring, the movement will continue to 'grind' along regardless of the condition of the lube or with a fair amount of dirt/grit/gunk.

    Long story short: A wristwatch will likely stop if without damage if all it needs is a standard cleaning and lube, according to my watchmaker.

    Therefore, I fall into the 'If it ain't broke...' camp.

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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    On a NOS watch, what would cause the Mainspring to be weakened?
    Ok to ruin/damage a watch with an ETA movement, cheap to fix or replace, but what about something more "inhouse"?

    i believe we have some (more) knwing guys, even watchmakers, on the Vintage Forum.

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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    Quote Originally Posted by Janne View Post
    On a NOS watch, what would cause the Mainspring to be weakened?
    Ok to ruin/damage a watch with an ETA movement, cheap to fix or replace, but what about something more "inhouse"?

    i believe we have some (more) knwing guys, even watchmakers, on the Vintage Forum.
    Maybe I didn't write that in a way that made sense, so I'll try again.

    Have you ever seen a mainspring from a wristwatch as compared to a mainspring from a pocket watch? The spring from a wristwatch is much smaller and hence 'weaker' by design, not out of being defective. The pocket watch mainspring is disproportionately larger.

    I trust my watchmaker. I'll let you know if he lets me down, but hasn't so far.

  10. #9
    Member Craig M's Avatar
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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    great question! I've always wondered that myself

    Thanks for all the responses thus far
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  11. #10
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    Re: New-old stock (NOS) watches-- do the movements need servicing?

    This reminds of some people, "Change the earl, heck no, I never change the earl. I just keep addin when it gits low."
    Quote Originally Posted by Janne View Post
    That First Commandment will for sure create a need for extensive repair and service!

    Yes, it need a good service. The very important oils have aged, changed viscosity or even dried out. Or moved to a place where they should not be.

    Of course, the damage caused will not show for a couple of months. After that, you will need far more expensive service and repair than if you did it soon after purchase!
    Would you run an engine that has been standing still for lots of years, with the original oil?

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