Officine Panerai

Many watches include this valve to allow deeper water resistance. Does it spontaneously works without any intervention, or do we have to push the "He marker" ? Thanks for your explainations cheers, Patrickh

Some designs have a manual helium release valve ( like a Omega Seamaster), others are automatic (Rolex Sea Dweller) where there is a spring loaded one way valve. As you dive deep and resurface, there is a pressure difference in the gases inside the watch ... 

Hi Patrick, DRMW covered most of it, but here's my editorial..... The HRV is for Saturated Diving, which mainly concerns commercial or research diving. It has nothing to do with the depth rating of the watch. And while an interesting feature, it's unnecce... 

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I think your teaching lessons will help some of us. Best regards, patrickh

Hello patrickh! Glad it helped. I always find it wonderful that the PuristS are such a diverse bunch with so much knowledge to share. Thanks again to BDLJ for the info! so Patrick, are you planning a diving trip now? -MW

if I dive through the crowd (LOL) to get one. I dived in corsica this year but without camera. Thanks, patrickh

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Thanks for taking the time to explain hat. I had wondered about the purpose and usefulness of HRVs and yours was such a succinct and clear explanation. Thank you. respo

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Much appreciated! Stephen

the sales guy at the AD was completely wrong..but I aint about to correct him...

He should know the product he is selling. Few things irritate me more than a salesperson who doesn't know his own material. Unfortunately that is the normal state of affairs at several major watch retailers these days...