The Dive Watch That Started It All, with Our 2 Most Popular Bands

This special bundle includes the Sea Quartz 30 fitted with a stainless steel bracelet, plus an extra OceanFlex black band. For a small premium over the standard version, you get an additional OceanFlex strap at a fraction of its regular price.

Original spec. Modern upgrades. Legendary status.

Before launching Momentum, our founder Simon and his family introduced the Sea Quartz 30 in 1977 under the Chronosport name. This was the first analog quartz dive watch on the general market. It quickly became a favorite among military divers and even made its way onto the wrist of Tom Selleck in the first three seasons of Magnum P.I..

Rebuilt from the original case design and upgraded with modern materials, the new Sea Quartz 30 stays true to its roots: rugged, reliable, and ready for anything.

• High-Torque Swiss Movement – Built for maximum durability and long-term accuracy.
• Unidirectional bezel - Keep track of time as you see fit.
• Sapphire Crystal – Scratch-resistant and vintage-inspired, just like the original.
• 300M Water Resistance – With screw-down crown and caseback for real dive performance.
• Matte 316L Stainless Steel Case – Bead-blasted for a no-glare, no-nonsense finish.
• Super-LumiNova® Hands & Markers – Glows bright through the night for effortless readability.
• Assembled in Canada – Designed and tested for life in and out of the water.
• Magnum P.I. Approved – A direct descendent of the iconic watch worn by Thomas Magnum himself.