![Sea Quartz 30 [42mm] - Black](http://momentumwatch.com/cdn/shop/files/SeaQuartz30-Studio-Final-large.png?v=1687306128&width=1096)
![Sea Quartz 30 [42mm] - Black](http://momentumwatch.com/cdn/shop/products/sq30-new-product_0000_Hue_Saturation-1.png?v=1687306128&width=1096)
![Sea Quartz 30 [42mm] - Black](http://momentumwatch.com/cdn/shop/products/sq30-new-product_0002_Layer-1.png?v=1687306128&width=1096)




Sea Quartz 30 [42mm] - Black
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.
For many brands, quartz dive watches are an afterthought. We are proud of our quartz watches and believe they belong in every watch enthusiast’s collection.
Select an Optional Band for Sea Quartz 30 [42mm] - Black
Add an Optional Engraving for Sea Quartz 30 [42mm] - Black
![Sea Quartz 30 [42mm] - Black](http://momentumwatch.com/cdn/shop/files/SeaQuartz30-Studio-Final-large.png?v=1687306128&width=1096)
SPECS
- Movement Swiss, Quartz (Battery), Ronda R507
- Dial Color Black
- Screw-down crown
- Water Resistance 300 / 990
DIMENSIONS
- Case Diameter 42mm
- Case Hight 11.3mm
- Lug Width 20mm
- Lug-to-Lug 47mm
MATERIAL
- Stainless Steel
- Sapphire Only
FEATURES
FEATURES
- Movement Swiss, Quartz (Battery), Ronda R507
- Dial Color Black
- Screw-down crown
- Water Resistance 300 / 990
- Case Diameter 42mm
- Case Hight 11.3mm
- Lug Width 20mm
- Lug-to-Lug 47mm
- Stainless Steel
- Sapphire Only

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.