Details of the CRISTALLO 🌊 The Helium Release Valve. On the side of the case, at 9 o'clock, you find the HRV that allows the clock to release excess gas during ascent in a way that does not affect its operation. #heliumescapevalve #heliumreleasevalve #gasescapevalve #diverwatch #diver #diverwatches #divingwatch #diving #watchmania #watchfam #watchfamusa #watchnerd #watchgeek #wus #watchuseek #orologiepassioni #divewatchesofinstagram #echoneutra #cristallo