Assertion: diver's pressure | /r/CreatedBy | helium
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text: Some diving watches intended for saturation diving at great depths are fitted with a helium or mixed breathing gas release or escape valve to prevent the crystal from being blown off by an internal pressure build up caused by helium that has seeped into the watch case in helium enriched environments (helium atoms are the smallest natural gas particles found in nature) as the watch and diver adjust to normal atmospheric conditions.