Helium escape valves usually show up on saturation-diving watches costing thousands; Timex puts one at 10 o’clock on a $469 automatic. It vents trapped helium during decompression so it doesn’t blow the crystal off — a real dive function, not a styling cue. Inside is a Miyota 21-jewel automatic movement, with 200m water resistance, a sapphire crystal, and a 44mm steel case. Rubber strap $469; steel bracelet $499.