Quote:
Originally Posted by Andad
Why do you have the watch underwater at 6 Bar Douglas? 
Are you trying to fill it up?  |
It’s a common watch pressure tester. You pressurize the watch with air above the water for a couple of minutes, lower it into the water, and then release the pressure. If air starts escaping (bubbles) when you release pressure, then you quickly raise the watch out of the water, so water doesn’t enter the case (watch fails test.) If no bubbles stream out of the watch, then the watch is sealed (watch passes test.)
I don’t plan on sending my 9F watches into GS unless they either stop working or fail this pressure test. Potentially decades-long service intervals are part of the beauty of the 9F quartz.