In 2013 Jason Heaton gave us the low-down on Helium Escape Valves, calling them the “most overused and misunderstood components found on watches today.” Six years later, anecdotally, it seems like the enthusiast community’s preference for HEVs has dwindled. As Jason explains, it’s a feature that’s designed for a very small segment of dive professionals, but it’s totally superfluous to most of us.  Introducing The Omega Seamaster Diver 300M For The 50th Anniversary Of ‘On Her Majesty’s Secret Service’ Hydraulic Power Unit, Hydraulic Power Pack, Mini Power Pack – Guorui,