Your cart is empty

Sea Quartz 30 GMT

$325.00 USD

Bezel Insert: Red & Blue 24H

Band: Stainless Steel

A legacy of precision now with a second time zone.

Built on the bones of the legendary Sea Quartz 30, the same model worn by Tom Selleck in Magnum P.I. the Sea Quartz GMT keeps the spirit of the original alive, with upgraded functionality for modern adventurers. Whether you’re flying over oceans or diving beneath them, the GMT complication tracks two time zones at once with classic, no-nonsense clarity.

✅ Dual-Time Functionality – 24-hour GMT hand makes it easy to track home time while traveling.
✅ High-Torque Quartz Movement – Shock-resistant and ultra-reliable in any climate or condition.
✅ Vintage-Inspired Design – Built on our 1970s case with period-correct details.
✅ Sapphire Crystal – Scratch-resistant and crystal clear, with a retro curve.
✅ 300M Water Resistance – Dive-ready with a screw-down crown and caseback.
✅ Super-LumiNova® Lume – Glows brightly through the night.
✅ Assembled in Canada – Durable, accurate, and ready to roam.

In stock

Quantity:

Sea Quartz 30 GMT

$325.00 USD

SPECS

Movement Swiss, Quartz (Battery), Ronda R505.24h
Dial Color Blue
Screw-down crown
Water Resistance 300 / 990
SKU: [sku]
Battery: 371

DIMENSIONS

Case Diameter 42mm
Case Height 11.3mm
Lug Width 20mm
Lug-to-Lug 47mm

MATERIAL

Stainless Steel
Sapphire Only

Movement Swiss, Quartz (Battery), Ronda R505.24h
Dial Color Blue
Screw-down crown
Water Resistance 300 / 990
SKU: 054AADAFD-AD-B-BQ-B-BQ-CLKA-D-A-B
Battery: 371

The Original Magnum P.I. Watch

In the early 1980’s, CBS launched the TV series Magnum PI. Set in Hawaii, it starred Tom Selleck. The series consistently ranked in the top 20 U.S. television programs for several years, finishing as high as number 3 for the 1982–83 season. And the watch that Tom Selleck wore for the first 3 seasons? Of course, it was the original Chronosport Sea Quartz 30. So we thought, why not combine the original Sea Quartz with the other watch he wore... the Pepsi GMT.

Authentic History, Better Performance

The Sea Quartz 30 models from the 1980’s have built an almost cult-like following with Magnum fans, divers, and watch fanatics. To make them proud, we recreated the Sea Quartz 30 as closely as possible to the original. Our historical connection to Chronosport meant we could send genuine cases, dials, hands, and bezels directly to our factories so they could analyze and match the design. Of course, we wanted to make some key improvements. The dial, hands, and bezel now feature C3 Super-LumiNova for vastly improved lume performance over the original. The original watch also featured a mineral bezel and crystal, which has been replaced with scratchproof sapphire for unmatched durability.

WE DO THINGS OUR WAY.

St. Moritz Watch Corp. designs, assembles and services high quality sports watches under the MOMENTUM® brand. As life becomes more active and a more casual style becomes the norm, our straightforward designs, with outstanding waterproof performance and no-BS pricing, resonate more and more with active people everywhere.

Sea Quartz 30 GMT

A legacy of precision now with a second time zone.

Add an Optional Engraving for Sea Quartz 30 GMT

You may also like

Do you have any questions?