Of the myriad ways in which we measure and compare watches, water resistance is a crucial aspect that sits high on the list of concerns for many watch fans – even those that have little intention of diving beneath the waves while wearing their watch. That being said, how much do you really know about how water resistance actually works? While Jack recently offered a look at why “no watch is waterproof,” this story is more about how we measure the concept of water resistance.
Should you need an, ahem, deep dive, look no further than this exploration of two different ISO ratings. Originally posted nearly three years ago, this post features Jack delving into the details of both ISO 6425 and ISO 22810, and, for dive watch nerds, it’s not to be missed.