How does it work? Air/Water-proofness with crown not screwed down

[Thuilln]

Basically what I want to know is how air/waterproof is the watch when the crown is unscrewded? I leave a few Rolexes in the safe and since I wind them about once a week, I don't bother screwing down the crown every time. I figure that there are seals inside the crown tube that prevent humidity and dirt to penetrate the watch even when the crown is left unscrewed (just like every watch with a regular crown), but is this really the case?

Thanks for clarifying this.

[77T]

In short, yes, for Twinlock and Triplock crowns/tubes/stems, there are o-rings and gaskets that remain engaged when the crown is unscrewed.

If you were going into deep dive underwater, I'd suggest more than 3 ATM, the crown must be screwed in to ensure maximum water resistance.

[bjw]

Originally Posted by 77T

In short, yes, for Twinlock and Triplock crowns/tubes/stems, there are o-rings and gaskets that remain engaged when the crown is unscrewed.

If you were going into deep dive underwater, I'd suggest more than 3 ATM, the crown must be screwed in to ensure maximum water resistance.

3 ATM is nearly 100 feet! You'd have no worries leaving your crown unscrewed at that depth?

I could see a in a shower or jump on the pool with no worries - but anything below 10-20 feet? You're kidding right?


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[DJExplorer]

Twin lock - one seal in the stem and one in the top of the crown.
Trip lock - 2 seals in the stem and one in the top of the crown (and an additional one around the crown tube threads)

[Tools]

Originally Posted by bjw

3 ATM is nearly 100 feet! You'd have no worries leaving your crown unscrewed at that depth?

I could see a in a shower or jump on the pool with no worries - but anything below 10-20 feet? You're kidding right?

Generally speaking, no, you would not have issues. There are plenty of watches that do not have the robust o-ring system Rolex uses and do not have screw down crowns and are waterproof.

The pushers on the Daytona are a good example. They only have a single O-ring around the stem and are waterproof to 100 meters without a screw-on cap.

[Thuilln]

Thanks all for your inputs, it answers my question.

[77T]

Originally Posted by bjw

3 ATM is nearly 100 feet! You'd have no worries leaving your crown unscrewed at that depth?

I could see a in a shower or jump on the pool with no worries - but anything below 10-20 feet? You're kidding right?


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I keep my crown screwed on


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