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Sea Quartz 30 [42mm] - Black

€295,00

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.

Band: Stainless Steel

Stainless Steel
Black Oceanflex Rubber
Orange Oceanflex Rubber

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  • 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
  • SKU: 054AADAFC-AB-B-AC-B-AC-CLKA-D-A-B
  • 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.

Reviews

Customer Reviews
4.9 Based on 472 Reviews
5 ★
91% 
428
4 ★
8% 
36
3 ★
1% 
4
2 ★
0% 
3
1 ★
0% 
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D
03/30/2024
Dave
United States
I recommend this product

I know what you're thinking......

And you're right, this watch is amazing!!! First rate fit and finish with sapphire crystal and screw-down crown. (Good luck finding these together anywhere else for under $300USD). The handset balance takes a little getting used to, but I understand the criticality of discerning minute from hour hand on a dive. Bezel operates confidently and the second hand hits the marks over half the time. Speaking of movements, this Ronda unit is a class unto itself. I've lost less than a second in two weeks. (Yes, you read that correctly.) Only gripe is the longevity of lume charge. I'm giving serious consideration to adding Momentum's GMT model to my collection as that serves as an outstanding imitation to Magnum's Rolex GMT. Bravo Momentum!!!!

JS
03/30/2025
Jordan S.
United States

Perfect watch

I love this watch. The quality for price is unreal. Some online reviews reference the seconds hand not hitting the markers, bezel being too stiff or loose, and the lume not being sufficient. I have not experienced any of these issues. Momentum seems to have taken these critiques and fixed the issues. The bezel is a bit stiff but that's what you want in a dive watch. You don't want to knock it out of place. You won't regret this purchase!

SS
03/19/2025
Scott S.
United States

Great Watch!

I enjoy this watch as it is comfortable to wear, not too big and still decent size for my large wrist. I love the styling and the simplicity of this timepiece in this day and age of over sized and featured watches. And the build quality is great.

BB
03/08/2025
Boyd B.
United States

Great watch! Great value!

Excellent looking dive watch! Love the history!

SM
03/04/2025
Scott M.
Canada

Great watch!

Lots of compliments on it. If I had to pick a fault, I would agree with some of the other reviews about the second hand not lining up with the markers. I truthfully wouldn't have noticed on my own.