Mechanical Performance Beneath the Surface
Dive watches have long held a special place in the world of mechanical watchmaking. Originally designed as professional tools for underwater exploration, they have evolved into one of the most popular categories of mechanical watches today—valued for their durability, legibility, and technical character.
For a manufacture with deep roots in movement engineering like SEA-GULL, the development of dive watches represents more than simply creating a sport watch. It is about combining robust case construction, reliable mechanical movements, and clear functional design to create timepieces capable of performing in demanding environments.
Today, SEA-GULL’s dive watch collection is unified under the Ocean Series, a lineup designed to bring together professional diving capability, mechanical reliability, and distinctive design language.
What Defines a Professional Dive Watch?
A true dive watch is more than an aesthetic inspired by the ocean. Professional dive watches are built around strict functional requirements that ensure reliability in underwater environments.
Key features typically include high levels of water resistance, secure screw-down crowns, unidirectional rotating bezels for timing dives, and strong luminous markers for visibility in low-light conditions. The construction of the case, crystal, and crown system must work together to maintain structural integrity under pressure.
SEA-GULL Ocean Series dive watches follow these fundamental principles while offering multiple levels of performance. Water resistance across the collection ranges from 200 meters to 1000 meters, covering everything from everyday aquatic use to professional-grade diving capability.
SEA-GULL Ocean Series Collection Overview
All SEA-GULL dive watches belong to the Ocean Series, which is organized into several distinct tiers designed for different levels of performance.
Ocean Series (200m Dive Watches)
The core Ocean Series models offer robust everyday dive watch capability, typically featuring 200 meters of water resistance, ceramic bezels, and clear, legible dials. These watches combine classic dive watch aesthetics with reliable mechanical movements suitable for daily wear.
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Ocean Series Pro (300m Professional Dive Watches)
The Ocean Series Pro represents SEA-GULL’s classic 300-meter professional dive watch platform. These models emphasize durability and professional specifications while maintaining balanced proportions suitable for both underwater use and everyday wear.
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Ocean Series Pro Special Edition
Flagship Model: Ocean Series Pro Special Edition Titanium Alloy Case
Reference: 414.12.1210
Water Resistance: 300m
Features: Calendar, Luminous, Diving
Ocean Series Ultra (1000m Extreme Dive Watches)
At the top of the range is the Ocean Series Ultra, designed for extreme environments with 1000 meters of water resistance. These watches incorporate a helium escape valve, allowing pressure to safely release during deep saturation diving conditions. It also designed with an integrated unidirectional rotating bezel for precise timing under water.
Flagship Model: Ocean Series Ultra 1000m
Reference: 816.37.1217
Features: Calendar, Luminous, Diving
Water Resistance: 1000m
Mechanical Movements: The Core of Diver Performance
At the heart of every SEA-GULL dive watch lies an in-house automatic movement, developed through decades of horological expertise.
Many Ocean Series models are powered by the ST2130 automatic movement, a reliable platform designed for three-hand watches with date display. Known for its stable performance and high serviceability, it has become a widely used automatic caliber across professional models.
Seagull ST2130 Movement
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Watch video Instructions: https://www.youtube.com/watch?v=y5KE82kwC8k
For watches featuring day-date displays, SEA-GULL uses the ST2100 automatic movement, which integrates weekday and date functionality into a robust mechanical architecture.
ST2100 Automatic Movement
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Some models within the collection also utilize movements from the ST25 family, configured for clean three-hand layouts without a date display, offering a more minimalist dial design while maintaining the reliability of SEA-GULL’s in-house automatic platforms.
Seagull ST25 Movement
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Together, these movements provide the mechanical foundation that allows Ocean Series watches to combine professional functionality with everyday reliability.
Distinctive Design& Craftsmanship
While functionality remains the foundation of a dive watch, SEA-GULL’s Ocean Series also explores creative design themes that reflect both maritime inspiration and cultural storytelling.
Many models feature ceramic bezels, offering superior scratch resistance and long-term durability compared with traditional aluminum inserts.They are lightweight, hypoallergenic, and impervious to UV light and corrosion, making them ideal for long-lasting diving timepieces.
Ocean Series 200m Sparkling Dial with Ceramic Bezel
Reference: 816.32.1047H
Water Resistance: 200m
Features: Calendar, Luminous, Diving
Some watch models incorporate complications rarely seen in dive watches, such as moon phase displays, adding a poetic astronomical element to the otherwise utilitarian design. This feature makes them particularly well-suited for ocean cruises, where functionality meets a more relaxed, experiential sense of time.
Ocean Series Pro 300m Moon Phase
Reference: 816.32.1215
Water Resistance: 300m
Features: Moon Phase, Luminous, Diving
The collection also includes several highly distinctive special editions. The 1984 Antarctic Expedition model features a dial with a sculpted relief design inspired by the Antarctic landscape, celebrating the spirit of exploration in extreme environments.
1984 Antarctic Expedition Special Edition
Reference: 816.17.1064A/816.37.1064A
Water Resistance: 200m
Features: Moon Phase, Luminous, Diving
Another unique interpretation is the Dragon Kings of the Four Seas edition, which incorporates a dragon-scale textured dial and a caseback engraved with the mythical Dragon Kings from Chinese maritime legend. This design merges traditional cultural symbolism with the modern dive watch format.
Reference: 811.52.1216/811.22.1216/811.32.1216/811.12.1216
Water Resistance: 300m
https://en.seagullwatch.com/products/1216
Engineering for Extreme Environments
For the most demanding conditions, the Ocean Series Ultra 1000m models are engineered with specialized features designed for deep-sea environments.
This Seagull’s pinnacle diver features integrated unidirectional rotating bezel allowing the watch functions in extreme circumstance underwater.
In addition to reinforced case construction and extreme water resistance, these watches are equipped with a helium escape valve, a feature typically found on professional saturation diving watches. This mechanism allows trapped helium molecules to safely exit the case during decompression, protecting the watch from internal pressure buildup.
Such engineering solutions demonstrate SEA-GULL’s ability to combine mechanical watchmaking with practical functional design.
Conclusion: Mechanical Dive Watches for a New Generation
Mechanical dive watches continue to attract enthusiasts because they represent the intersection of engineering, craftsmanship, and adventure. Unlike electronic instruments, mechanical watches operate through precisely manufactured gears, springs, and escapements—systems capable of functioning for decades with proper care.
For SEA-GULL, the Ocean Series reflects the brand’s broader philosophy: combining movement manufacturing expertise with practical watch design to create mechanical watches that are both reliable tools and meaningful objects of craftsmanship.
From everyday 200m dive watches to the extreme 1000m Ocean Series Ultra, the collection offers a wide range of mechanical dive watches designed to meet the needs of modern enthusiasts and explorers alike.
