Kool Mods
Sea-Dweller 'Double Red' - Custom Mod Watch
Sea-Dweller 'Double Red' - Custom Mod Watch
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Seiko Mod 1665 Vintage Sea Dweller Double Red – NH35A
This Seiko mod is inspired by the legendary Rolex 1665 Double Red Sea-Dweller, one of the most iconic dive watches ever made. It features the signature double red text on the dial, a sturdy stainless steel case, and a classic unidirectional bezel.
Powered by the reliable NH35A automatic movement, this watch is built for everyday wear with the rugged style of a true deep-sea tool watch. Whether you're a vintage dive watch fan or just want something bold and timeless on your wrist, this 1665 Double Red mod is a solid choice.
Add a legend to your collection today!
Crystal
Crystal
- Flat Sapphire
Case
Case
- Case Material: 316L Stainless Steel
- Caseback: Screw Down Sealed Caseback
- Case Size: 40MM
- Case Thickness: 16MM
- Bezel Material: Aluminium
- Dial Colour: Black
Bracelet
Bracelet
- Bracelet / Strap Material: 316L Stainless Steel
- Lug Width: 20MM
Movement
Movement
- Caliber: NH35A
- Movement Type: Automatic
- Water Resistance: 5ATM (Pressure Tested)
- Power Reserve: 41 Hour
Handling Time
Handling Time
As each watch is custom built to order, please expect a 2 to 4 week build time. We try to turn around under the handling time but occasionally delays can occur.
Water Resistance
Water Resistance
A watch that is water-resistant to 5ATM (50 meters or 165 feet) can handle more than just occasional splashes of water. However, to ensure your watch remains in optimal condition and retains its water resistance, proper care is essential. Here’s a comprehensive care guide to help you maintain your 5ATM water-resistant watch.
Understanding 5ATM Water Resistance
Before diving into the care instructions, it’s important to understand what 5ATM water resistance means.
- 5ATM indicates that the watch can withstand water pressure up to 50 meters deep.
- This rating is suitable for light water activities such as swimming in shallow water.
- It is not suitable for diving, snorkelling, or any high-pressure water activities.
Do Not Wear Your Watch in Showers
Avoid Hot Water: Do not wear your watch in hot showers, saunas, or hot tubs. The heat can cause the seals to expand and contract, compromising the water resistance. This can cause your watch to fog.
Important Links
Important Links
Please ensure you are familiar with our policies and contact details:
Questions
Questions
We're happy to answer any questions. Click our Contact Page for contact details.
Share
This watch is excellent. Workmanship is pristine and detail finishing is good. Nice watch!
Très belle montre, finitions parfaites. Super travail de l’équipe Kool Mods. Greetings from France.





