dispelling water resistance myths

[greggsiam]

I apologize if you guys have seen this before, but I think it is a great post from another forum dispelling some of the myths associated with water resistance ratings (e.g. diving will increase the pressure beyond the depth rating) . It's all backed with actual numbers and examples, so not just opinions.

http://forums.watchuseek.com/f2/sigh...-610734.html#/

[SDRider]

I would bet that most of the stories you hear of popped crystals in steam rooms and hot tubs involve fake watches.

[bayerische]

Yes, there is much ignorance when it comes to pressure, whatever the kind (water, gas).

Funniest I remember was someone claiming water pressure can only apply straight down.

[SearChart]

Cool article.


Never worried about water resistance myself, that is why I tested my Seiko SKX at 500m instead of the rated 200m

[Andad]

Is your watchmaking cred on shaky ground here Bas.

[SearChart]

Originally Posted by directioneng

Is your watchmaking cred on shaky ground here Bas.

Nah, just like to boast about how good my little Seiko is!

[Abdullah71601]

Originally Posted by SearChart

Cool article.


Never worried about water resistance myself, that is why I tested my Seiko SKX at 500m instead of the rated 200m

Did you observe any case or component deformation?

[SearChart]

Originally Posted by Abdullah71601

Did you observe any case or component deformation?

Not at all. Did the condensation test and it all passed perfectly.

[Abdullah71601]

Originally Posted by SearChart

Not at all. Did the condensation test and it all passed perfectly.

I would think the caseback would have deflected under the pressure.

[SearChart]

Originally Posted by Abdullah71601

I would think the caseback would have deflected under the pressure.

Yet there is no visible deformation whatsoever.

[Abdullah71601]

Originally Posted by SearChart

Yet there is no visible deformation whatsoever.

No residual deformation.

As an example, my first underwater camera housing was rated to 45 meters. I dove it to 60 meters one time. The housing deformed enough that the housing buttons were no longer aligned with the camera buttons, and it was essentially unusable. No leaks. When I got to the surface all was fine again.

My concern would be the caseback or crystal pressing against the movement under pressure. It is cool that the Seiko is built to take it though.

[SearChart]

Originally Posted by Abdullah71601

No residual deformation.

As an example, my first underwater camera housing was rated to 45 meters. I dove it to 60 meters one time. The housing deformed enough that the housing buttons were no longer aligned with the camera buttons, and it was essentially unusable. No leaks. When I got to the surface all was fine again.

My concern would be the caseback or crystal pressing against the movement under pressure. It is cool that the Seiko is built to take it though.

Good point, I didn't think of that.
Movement/dial wasn't inside the case during the test.

[Jeffwb65]

Originally Posted by SearChart

Cool article.


Never worried about water resistance myself, that is why I tested my Seiko SKX at 500m instead of the rated 200m

This just makes even more happy I picked up an SKX009 last week. It has made me ignore all my other watches the past several days. I'm amazed at how much watch I got for less than $200.

2018-03-15_07-21-52_017.jpeg

[Mewski]

Did you recommend this Seiko? It is comfortable in normal use?

[Mousehunter]

Back when I took scuba, my instructor held some depth records (or should have). On his record setting dive he aborted due to blowing out 2 depth gauges. His Casio servided unscathed. His dive partner (who went deaper) also did not.

His dive was in a sinkhole. I have always assumed that open water has deeper records. His dive buddy is still on the books with the deapest air dive-mostly because it was stupid deap and the record was closed to prevent more people from dying. He hit close to 900’ ft. O2 in air is toxic at 196 iirc. He was chasing to other narced divers but was unable to save them

[Jeffwb65]

Originally Posted by Mewski

Did you recommend this Seiko? It is comfortable in normal use?

If You're asking about my SKX009 in my photo, yes. It's very comfortable, and feels smaller than its 42mm size. I didn't like the stiff resin strap it came on, so I've used the soft leather one in the picture. I've also used soft rubber and NATO straps.

[greggsiam]

Originally Posted by Mewski

Did you recommend this Seiko? It is comfortable in normal use?

Pair it with a good oyster bracelet and it is a bulletproof watch for roughly $300. The SKX series is one of the most modded watches I have ever seen.

[SearChart]

Originally Posted by Mewski

Did you recommend this Seiko? It is comfortable in normal use?

It is the best watch you can get for less than $200, one of my favourites.

[breitlings]

IDK man, when the first thing out of the gate is talking about velocity affecting water resistance and not acceleration that lost a lot of credibility for me, velocity has far less effect than acceleration in terms of forces. Then they talk about the speed of nuclear submarines, that is highly classified, they wouldn't know how fast they really go and if they did, which I doubt by discussing velocity not acceleration, they shouldn't be talking about it.

[superdog]

Way over my head.

I don’t get half of the math he presented.

[ttomczak]

Originally Posted by SearChart

It is the best watch you can get for less than $200, one of my favourites.

Love my Orange and Black monsters.




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[Andad]

Originally Posted by SearChart

Good point, I didn't think of that.
Movement/dial wasn't inside the case during the test.

But you would have retested it with the movement in the case at same pressure to confirm the final assembly?

Then taken it for a test dive?

[milov]

Originally Posted by SearChart

Cool article.


Never worried about water resistance myself, that is why I tested my Seiko SKX at 500m instead of the rated 200m

But would you consider doubling the pressure tests on your clients watches?

[SearChart]

Originally Posted by directioneng

But you would have retested it with the movement in the case at same pressure to confirm the final assembly?

Then taken it for a test dive?

Now I would feel confident, might do that still.
As for the diving, no fkin way I'm diving, nope nope nope nope.

Originally Posted by milov

But would you consider doubling the pressure tests on your clients watches?

Hmmm will you volunteer your watch?