The Breitling Watch Source Forums

"A helium release valve, or helium escape valve, as it is also called, is a feature found on some diving watches. It provides functionality for professional divers operating at great depths for prolonged periods of time or under saturation.

When commercial divers operate at great depths, they often spend prolonged hours in diving bells under pressure breathing a breathing gas mix like trimix or similar, that contain the gases helium or hydrogen. Since helium atoms are the smallest natural gas particles found in nature, these gas atoms are able to work their way inside the watch, around any o-rings or other seals the watch may feature. This is not a problem as long as the divers stay under pressure, but when the decompression stops during resurfacing aren't long enough, a pressure difference builds up between the trapped gas(es) inside the watch case and its environment. Depending on the construction of the watch case and crystal, this effect can cause damage to the watch, like making the crystal pop off."

Ok I figured it was SS anyways, it's a pig. This model is A17330, does that mean it has the older or newer dial?

Also, I was wondering if this watch has to be babied at all, because I fully plan on wearing it day to day.