Automatic

Sea Auto 30 [42mm] Black

$709.00
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.

Many customers have asked us whether we could make the original design with the steel case and add an automatic movement option. You asked. We listened.

Interested in the original Sea Quartz 30 design with the classic (battery-powered) Swiss-made quartz movement? Click HERE.

Band: Steel Bracelet

Steel Bracelet
Orange Oceanflex Rubber
Black 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
  • Japanese automatic movement
  • Stainless steel case
  • Movement: Japanese, Automatic (Miyota 9015)
  • Dial Color: Black
  • Crown: Screw-down crown
  • Water Resistance (m/ft) : 300 / 990
  • SKU: 054AADAHB-AB-B-AC-B-CLKA-D-A-B
  • Case Material: Stainless Steel
  • Crystal: Sapphire Only
  • Case Diameter: 42mm
  • Case Height: 12.6mm
  • Lug Width: 20mm
  • Lug-to-Lug: 47mm
Sea Auto 30 [42mm] Black
Sea Auto 30 [42mm] Black
Inspired by Icons

Before founding Momentum, our founder, Simon, was at the helm of the renowned watch company, Chronosport. Their iconic UDT model gained worldwide recognition for its durability and reliability, worn by elite military units and Hollywood stars like Sylvester Stallone in Rambo III. Similarly, the Sea Quartz 30, made famous by Tom Selleck in Magnum P.I., became a symbol of timeless style.

To honor this rich heritage, we’re thrilled to introduce the Sea Auto 30. This modern reinterpretation of the original Sea Quartz 30 combines the classic design elements that captivated audiences with the advanced features of today’s watchmaking.

Sea Auto 30 [42mm] Black
Reliable Automatic Movement

Powered by a premium Miyota 9015 automatic movement, the Sea Auto 30 offers a blend of style and performance. This Japanese-made movement features a 42-hour power reserve, 28,800 beats per hour, and 24 jewels for exceptional reliability. With its sleek, rounded steel case and subtle design, this dive watch is both elegant and durable. Enjoy the convenience of automatic and manual winding, quick-set date, and hacking functionality.

Reviews

Customer Reviews
5.0 Based on 9 Reviews
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Filter Reviews:
JT
03/13/2025
Joshua T.
United States
I recommend this product

Great automatic diver

I ordered this during the pre-sale and very excited to get it on the wrist. I have a Sea Quartz 30 but was looking for an automatic version as I love the mechanical watches. This watch does everything for me; looks good, keeps great time and the straps are easy to swap if i want to change the look. My o ly complaint is it does not have the day complication like the Sea Quartz 30 does. Only a minor detail but if one was released with it I would purchase it in a heartbeat.

BA
02/24/2025
Bruce A.
United States

Momentum Sea Auto 30 is an awesome watch!

I am really enjoying the Momentum Sea Auto 30 I recently ordered from you. I like the Magnum P.I. connection here, with it being similar to the quartz version Tom Selleck wore in the first few years of the series. I like the fact that you also made it in a mechanical version. Magnum P.I. was one of my favorite shows of all time (I am such a product of the 1980s).

02/24/2025

Momentum Watch

Hi Bruce! Happy to hear you are enjoying your Sea Auto! Edward

ED
12/16/2024
Evin D.
Canada
I recommend this product

Daily Durability

I purchased a Sea Auto 30 a couple months ago when it was first released. I was originally drawn to the Sea Quartz 30 because of it's history and style, but I'm glad I held out for the automatic movement. It's a great value for anyone who either has an interest in starting a modest collection or as a daily wear timepiece. I have several watches covering a range of complications, features and price points, but the Sea Auto 30 has risen to the top as a reliable choice that feels right at home in casual, dress, adventure and sport environments.

OA
11/23/2024
Oliver A.
United States
I recommend this product

Awesome watch

Love this piece! Fast and prompt delivery and my daily time piece. Only wish it came with a day complication with the date but otherwise great. Highly recommended.

D
11/14/2024
Dominic SVG verified by SHOP
Australia

Excellent quality watch for the price. Case and Dial design is very good . This is a proper tool watch with excellent Lume quality. Built to withstand a beating.