Left crown unscrewed

[tie219]

Hi all,

Early today I was adjusting the time on my 16710 GMT II, it runs fast, and forgot to screw in the crown. I noticed hours later as I looked down to check the time. During that time, I know that I washed my hands, although, i'm not sure water even came in contact with the watch. This is probably just my paranoia, but if water did enter the movement, would it be really obvious, or would the signs show up at a later service?

Thanks!

[shofzr]

Chances are you are ok providing the gasket inside your 24-5330-0 tube is intact.

You would most likely see fog inside your crystal if any water entered the case.


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[tie219]

Thats a relief, thanks. I just got a little nervous because the service history of my watch is unknown. Although the seller I purchased from does pressure testing.

[Tools]

Originally Posted by tie219

Thats a relief, thanks. I just got a little nervous because the service history of my watch is unknown. Although the seller I purchased from does pressure testing.

The o-ring seal is inside the tube. The crown gasket is a secondary seal - hence the name, Twin-Loc.

Contrary to popular belief, it is not the crown and tube seals that are the ones that fail and let water in most often; it is the crystal seal.

As mentioned, if you don't see water, you likely don't have any.

[tie219]

Thanks, I don't see any water or fogging at the moment so I guess I'm in the clear. And I learned something new

[jkroman]

Likely nothing to worry about. Keep an eye out for any fog forming under the crystal now that you have the crown closed.

[77T]

Originally Posted by tie219

Thats a relief, thanks. I just got a little nervous because the service history of my watch is unknown. Although the seller I purchased from does pressure testing.

The seller did that test with crown screwed in, no doubt...

I agree that you should be fine, but maybe to add some peace of mind down the road, why not drop by a trusted watchmaker?

Have him/her do a pressure test with crown unscrewed. That way you’ll know if the stem’s o-ring alone is sealing sufficiently to pass 3 ATM (in other words enough WR to cover daily use, washing, etc.)


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[tie219]

That's not a bad idea, I'll have to look into watchmakers near me. I'm new to mechanical watches in general so I don't have a relationship with a watchmaker unfortunately. Maybe someone knows a trustworthy shop in Allentown, PA?