Crown-tastiche

[shedlock2000]

I’m not a collector, but I’ve had a few references over the years (maybe 12). This is a first:




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[Carguy87]

Noice! it does bug me a bit that on $10k+ watches Rolex hasn’t figured out a system for the crown to line up like this from the factory.

[shedlock2000]

Originally Posted by Carguy87

Noice! it does bug me a bit that on $10k+ watches Rolex hasn’t figured out a system for the crown to line up like this from the factory.

Right!?

All things being equal (and I say this as an engineer) it’s actually really not that hard to do — so I am surprised they haven’t. There are two sets of threads to consider (the tube and the crown), but it’s just a matter of starting the thread cut in a specific place!


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[puma1552]

Originally Posted by Carguy87

Noice! it does bug me a bit that on $10k+ watches Rolex hasn’t figured out a system for the crown to line up like this from the factory.

They have - the Skydweller keeps the coronet upright, but I don't think it's as simple as some think because it's more about gasket compression, etc. I think the Skydweller crown design is actually pretty complex in order to do this.

That said, mine is about 1 degree away from being completely upside down.

[shedlock2000]

Originally Posted by puma1552

They have - the Skydweller keeps the coronet upright, but I don't think it's as simple as some think because it's more about gasket compression, etc. I think the Skydweller crown design is actually pretty complex in order to do this.

That said, mine is about 1 degree away from being completely upside down.

ok if you live in the Antipodes!

I didn’t know that about the Skydweller. I suspect that it must have quite a different everything, given it’s functions. I’ve never actually seen one, but I hear they’re quite complex.


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[Andad]

Originally Posted by shedlock2000

Right!?

All things being equal (and I say this as an engineer) it’s actually really not that hard to do — so I am surprised they haven’t. There are two sets of threads to consider (the tube and the crown), but it’s just a matter of starting the thread cut in a specific place!


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Hi Steve,

Assuming that the Rolex crown always starts in the same place due to the coarse thread the issue is the variance in the crown tube seal and the change in thickness as the crown seal compresses with wear.
When you receive your watch back from its next service the crown position will have changed.
Probably not worth a RSC’s time to set up a 12 o’clock crown position given the few owners who are aware of this ‘issue’ or even care.

If it bothers you just screw the crown in and then back it out to the 12 o’clock position.
This will have no affect on the water resistance.

[Calatrava r]

Just looked at the upside-down crown logo on my Sub. It is apparently hit or miss with Rolex on this. I suspect over time something will wear in the crown, a gasket somewhere, and even if it is aligned from the factory by design over time it would move out of alignment. So why bother.

[brandrea]

Originally Posted by Calatrava r

Just looked at the upside-down crown logo on my Sub. It is apparently hit or miss with Rolex on this. I suspect over time something will wear in the crown, a gasket somewhere, and even if it is aligned from the factory by design over time it would move out of alignment. So why bother.

That’s pretty much what I think as well

[Ferrari308]

I had to look at my Sub, which I am wearing today.

The crown is pointing at around 8 o'clock.

I never paid that much attention to it until now. Now it is going to bug me. I will have to see where my others are pointing.


PDG

[puma1552]

I think of it as the 11:59 coronet - one more minute of rotation as the seal compresses/wears and it'll be squarely upside down at 12:00

[Dan Pierce]

Originally Posted by Calatrava r

Just looked at the upside-down crown logo on my Sub. It is apparently hit or miss with Rolex on this. I suspect over time something will wear in the crown, a gasket somewhere, and even if it is aligned from the factory by design over time it would move out of alignment. So why bother.

Yep, alignment now, insanity later.
dP

[shedlock2000]

Originally Posted by Andad

Hi Steve,

Assuming that the Rolex crown always starts in the same place due to the coarse thread the issue is the variance in the crown tube seal and the change in thickness as the crown seal compresses with wear.
When you receive your watch back from its next service the crown position will have changed.
Probably not worth a RSC’s time to set up a 12 o’clock crown position given the few owners who are aware of this ‘issue’ or even care.

If it bothers you just screw the crown in and then back it out to the 12 o’clock position.
This will have no affect on the water resistance.

I assumed that gasket compression was relevant in the alignment, but gaskets are a known thickness and accountable. They certainly wear over time but should also be replaced every service, so the effect of compression shouldn’t be that significant on older novels with only one gasket in open to compression!

First I’ve had that’s lined up, though. And it kinda does bother me! Lol! Not that I’m OCD or anything…


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[shedlock2000]

Originally Posted by Dan Pierce

Yep, alignment now, insanity later.
dP

I’m not entirely sure it isn’t the other way around!


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[shedlock2000]

Originally Posted by puma1552

I think of it as the 11:59 coronet - one more minute of rotation as the seal compresses/wears and it'll be squarely upside down at 12:00

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[Robf52]

Originally Posted by Carguy87

Noice! it does bug me a bit that on $10k+ watches Rolex hasn’t figured out a system for the crown to line up like this from the factory.

+1.

[SS Oyster]

Originally Posted by Andad

If it bothers you just screw the crown in and then back it out to the 12 o’clock position.
This will have no affect on the water resistance.

This is NOT true - always screw your crown in until snug.


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[Andad]

Yes it is.

Rolex stated this on their website many years ago.

[Andad]

Originally Posted by puma1552

I think of it as the 11:59 coronet - one more minute of rotation as the seal compresses/wears and it'll be squarely upside down at 12:00

That’s the Australian model.

[SS Oyster]

Originally Posted by Andad

Yes it is.

Rolex stated this on their website many years ago.

Do you mean this instruction booklet available on their website?

https://www.rolex.com/en-us/media/user-guides





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[Andad]

At one time on their website Rolex stated that the Triplock was rated to 500 Bar even with the crown unscrewed.

A finger tight crown seal is not going to do much at that pressure.

My Daytona is rated to 100 metres but has no seals on the screw down pusher heads.

The pushers just have internal seals like the Twinlock.

If you unscrew a Daytona pusher you have the same spec as an unscrewed Twinlock crown at 100 metres but based on a SOP I am not surprised that Rolex suggest they should be screwed down.

[SS Oyster]

Originally Posted by Andad

At one time on their website Rolex stated that the Triplock was rated to 500 Bar even with the crown unscrewed.

A finger tight crown seal is not going to do much at that pressure.

My Daytona is rated to 100 metres but has no seals on the screw down pusher heads.

The pushers just have internal seals like the Twinlock.

In that case, what’s the purpose of the screw down crown and the third seal on the underside of the crown itself?



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[shedlock2000]

Originally Posted by SS Oyster

In that case, what’s the purpose of the screw down crown and the third seal on the underside of the crown itself?



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So far as I understand, the triplock crown is merely overkill on Rolex’s part. I’m not sure how Omega’s crown system works, but I don’t know that the old SMP has a gasket in the same place as the Triplock (suggesting that it’s not actually necessary for 300m water resistance).


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[SS Oyster]

I would not be “maybe, because Omega” guessing when exposing a watch to depth. I’d just follow the Rolex booklet.

That was my original point when countering the … go ahead and unscrew your crown for aesthetics … advice, stating that it didn’t matter to watertight integrity.


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[joli160]

Indeed a nice little detail on my RG SkyD.

[Andad]

Originally Posted by SS Oyster

I would not be “maybe, because Omega” guessing when exposing a watch to depth. I’d just follow the Rolex booklet.

That was my original point when countering the … go ahead and unscrew your crown for aesthetics … advice, stating that it didn’t matter to watertight integrity.


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Disclaimer:

Don’t forget to screw your Rolex crown in before you wash your hands.

[Andad]

Originally Posted by SS Oyster

In that case, what’s the purpose of the screw down crown and the third seal on the underside of the crown itself?



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Could be to prevent the crown from metal to metal contact on the case or crown tube?

[KatGirl]

Originally Posted by SS Oyster

This is NOT true - always screw your crown in until snug.


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THAT goes without saying…..

Kat


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[KatGirl]

Originally Posted by Andad

Could be to prevent the crown from metal to metal contact on the case or crown tube?

Seals are about preventing water ingress.

Kat


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