"TESTED to DESTRUCTION The 10 MILES watch was independently pressure tested and officially certified in a specialist German research facility, the only facility of its type in Germany capable of pressure testing up to 4’000 bar, the equivalent of 40’000m.
It was tested with two different crystal set-ups, firstly with an 8.25mm crystal that finally succumbed to 2’530 bar of pressure, the equivalent of 25’300m of water-resistance.
We were not expecting the crystal to perform so well, so had prepared a second watch fitted with a thicker, 10.50mm crystal which surpassed the 8.25mm crystal only by 32 bar. It was finally destroyed at 2’562 bar, the equivalent of 25’620m of water-resistance."
http://oceanictime.blogspot.com/2018/11/h2o-watch-kalmar-2-x-oeanictime-10.html
It was tested with two different crystal set-ups, firstly with an 8.25mm crystal that finally succumbed to 2’530 bar of pressure, the equivalent of 25’300m of water-resistance.
We were not expecting the crystal to perform so well, so had prepared a second watch fitted with a thicker, 10.50mm crystal which surpassed the 8.25mm crystal only by 32 bar. It was finally destroyed at 2’562 bar, the equivalent of 25’620m of water-resistance."
http://oceanictime.blogspot.com/2018/11/h2o-watch-kalmar-2-x-oeanictime-10.html