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Sea Quartz 30 [42mm] - Black

3 reviews
Before starting Momentum, our founder Simon and his family owned a watch company called Chronosport. In 1977, they launched one of the first-ever analog quartz diver’s watches, the Sea Quartz 30. The brand became so popular that it was soon sold in almost every serious dive store in the US and Canada. This watch was also famously worn by Tom Selleck in the first 3 seasons of the hit show Magnum PI.

Our January and May 2023 pre-orders are now sold out. Thank you all again for the fantastic response to the Sea Quartz 30.

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Band: Black Tropic FKM Rubber

Black Tropic FKM Rubber
Orange Tropic FKM Rubber
  • Iconic design based on one of the first quartz dive watches
  • Screw-down crown and 300M water-resistance rating
  • Thick C3 Super-LumiNova luminous markers, hands, and bezel
  • Scratchproof sapphire crystal and bezel insert
  • Swiss-made high-torque Ronda quartz (battery-powered) movement
  • Original watch worn by Tom Selleck in Magnum P.I.
  • Original brand owned by Momentum’s Founder & President
  • Movement: Swiss, Quartz (Battery), Ronda R507
  • Dial Color: Black
  • Crown: Screw-down crown
  • Water Resistance (m/ft) : 300 / 990
  • Case Material: Stainless Steel
  • Crystal: Sapphire Only
  • Case Diameter: 42mm
  • Case Height: 11.3mm
  • Lug Width: 20mm
  • Lug-to-Lug: 47mm
Sea Quartz 30 [42mm] - Black
Sea Quartz 30 [42mm] - Black
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.

Sea Quartz 30 [42mm] - Black
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. What we didn’t change is the iconic design.


Customer Reviews
4.7 Based on 3 Reviews
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Neil E.
Canada Canada
I recommend this product

Great reproduction

I love the retro style of this watch. I watched Magnum PI as a kid and the scene with him loading his gun with his watch clearly visible is one of my favourites so this watch really brings me back. Overall the watch is well finished. The tropic strap is more supple than other ones I own so it’s very comfortable. This is my fifth Momentum watch and I am very happy with it.

Momentum Watch Sea Quartz 30 [42mm] - Black ReviewMomentum Watch Sea Quartz 30 [42mm] - Black ReviewMomentum Watch Sea Quartz 30 [42mm] - Black Review
Daniel O.
Canada Canada
I recommend this product

Brilliant homage to the Chronosport!

Amazing recreation of the original, rugged and practical, but elegant. And the case, while fairly large doesn’t feel heavy or bulky at all. I think its a little overpriced considering the movement is Quartz, but its still a great watch and I’m very happy with it.

Momentum Watch Sea Quartz 30 [42mm] - Black Review
Nickolas A.
United States United States
I recommend this product

Pre-Ordered Immediately

Very excited to see Momentum take this project on! Homages could never scratch the surface of how cool this watch is! Excited to go wear mine on a surf-ski