Choosing the right dive watch is not only about specifications—it is also about finding the right size for your wrist. The San Martin SN0126G Automatic Mechanical Watch offers both, with 38mm and 42mm case options, a reliable Miyota 90S5 automatic movement, an eye-catching 3D wave texture dial, and professional 200M water resistance.

Available in multiple gradient dial colors and equipped with a ceramic bezel, sapphire crystal, and upgraded On-The-Fly adjustable clasp, the SN0126G is designed for watch enthusiasts looking for a versatile mechanical diver with premium specifications.

Whether you prefer the compact proportions of a 38mm automatic dive watch or the stronger wrist presence of a 42mm diver watch, the San Martin SN0126G gives you the freedom to choose.

38mm or 42mm – Choose the Right Size for Your Wrist

One of the biggest advantages of the San Martin SN0126G is the availability of two case sizes.

38mm Version

The 38mm model offers compact, balanced proportions:

• Case Diameter: 38mm
• Lug to Lug: 46.5mm
• Thickness: 11.7mm
• Weight: Approximately 145g
• Bracelet Width: 20mm tapering to 16mm

For enthusiasts who prefer smaller watches, vintage-inspired proportions, or a more understated everyday diver, the 38mm SN0126G is an excellent option.

42mm Version

For those who prefer a larger and more substantial sports watch:

• Case Diameter: 42mm
• Lug to Lug: 50mm
• Thickness: 13.6mm
• Weight: Approximately 174g
• Bracelet Width: 21mm tapering to 16mm

The 42mm SN0126G provides greater wrist presence while maintaining the same distinctive design language and professional dive watch functionality.

Having both sizes makes the SN0126G easier to match with different wrist sizes and personal preferences.

Miyota 90S5 Automatic Mechanical Movement

At the heart of the San Martin SN0126G is the Miyota 90S5 automatic mechanical movement.

Miyota's 9000-series movements are widely recognized among mechanical watch enthusiasts for their combination of slim construction, dependable performance, and Japanese engineering.

For the SN0126G, the Miyota 90S5 complements the premium specifications of the watch while maintaining the traditional experience of owning a fully mechanical automatic timepiece.

Simply wear the watch regularly and the movement winds automatically through the motion of your wrist—no battery required.

Enamel 3D Wave Texture Dial

The dial is one of the most distinctive features of the San Martin SN0126G dive watch.

Rather than using a conventional flat dial, San Martin has created an enamel 3D wave texture, adding depth and visual movement to the watch.

Depending on the angle and lighting, the textured surface creates different reflections, helping each dial feel more dynamic on the wrist.

Available colors include:

• Gradient Light Blue to Blue
• Gradient Blue to Black
• Gradient Green to Black
• Classic Black

The gradient versions are particularly striking, with colors transitioning from lighter tones into deeper shades across the textured surface.

A printed San Martin hexagon logo completes the clean dial layout.

Ceramic Bezel with 120-Click Unidirectional Action

A proper mechanical dive watch needs a functional timing bezel.

The SN0126G features a 120-click unidirectional bezel with a ceramic bezel insert.

Ceramic offers excellent resistance to scratches and fading, making it a practical material for a watch designed for frequent wear.

The 120-click mechanism also provides precise adjustment when using the bezel to measure elapsed time.

Combined with the wave-textured dial, the ceramic bezel reinforces the SN0126G's modern dive watch character.

Sapphire Crystal with AR Coating

Protecting the dial is a sapphire crystal with anti-reflective coating.

Sapphire is highly resistant to scratches, making it an excellent choice for an everyday mechanical watch.

The additional AR coating helps reduce unwanted reflections and improves dial visibility under different lighting conditions.

For a watch designed to move between daily wear, outdoor activities, and underwater environments, this combination provides both durability and clarity.

BGW-X1 Blue Lume for Excellent Nighttime Visibility

The SN0126G uses BGW-X1 blue luminous material on both the hands and hour markers.

The classic hands feature a luminous coating that provides a bright blue glow in darker environments.

This gives the watch excellent readability whether you're checking the time at night or using it in low-light conditions.

200M Water Resistance for Serious Everyday Performance

With 20Bar / 200 meters of water resistance, the San Martin SN0126G offers the capability expected from a modern automatic dive watch.

Its water-resistant construction includes:

• Screw-down crown
• Screw-down case back
• 120-click unidirectional bezel
• Robust 316L stainless steel case

This makes the SN0126G suitable for everyday wear, swimming, snorkeling, and recreational diving.

It is not simply designed to look like a dive watch—the specifications provide genuine everyday water resistance and versatility.

Solid 316L Stainless Steel Bracelet

The SN0126G is paired with a solid 316L stainless steel bracelet featuring a fully brushed finish.

Polished chamfers along the bracelet provide additional refinement and help create a more comfortable transition around the wrist.

The bracelet measures approximately 200mm / 7.87 inches in length, with dimensions adjusted according to the case size:

38mm version: 20mm → 16mm
42mm version: 21mm → 16mm

The tapered construction keeps the bracelet substantial near the case while becoming slimmer around the clasp for improved comfort.

Upgraded On-The-Fly Adjustable Clasp

Another important feature of the SN0126G is its upgraded On-The-Fly (OTF) adjustable clasp.

Instead of relying entirely on traditional bracelet sizing, the OTF system allows quick micro-adjustments to the bracelet without requiring tools.

This is especially useful when your wrist expands or contracts slightly throughout the day because of temperature, activity, or travel.

The clasp is finished with the recognizable San Martin hexagon logo, maintaining the design language of the watch.

San Martin SN0126G Specifications

Brand: San Martin
Model: SN0126G

Movement

• Miyota 90S5 Automatic Mechanical Movement

Case

• 316L Stainless Steel
• Diameter: 38mm / 42mm
• Lug to Lug: 46.5mm / 50mm
• Thickness: 11.7mm / 13.6mm

Crystal

• Sapphire Glass
• Anti-Reflective Coating

Bezel

• 120-Click Unidirectional Dive Bezel
• Ceramic Bezel Insert

Dial

• Enamel 3D Wave Texture
• Gradient Light Blue-Blue
• Gradient Blue-Black
• Gradient Green-Black
• Black
• Printed San Martin Hexagon Logo

Hands & Lume

• Classic Luminous Hands
• BGW-X1 Blue Lume
• Luminous Hands and Hour Markers

Crown

• Screw-down Crown
• 3D San Martin Hexagon Logo

Case Back

• Screw-down Case Back
• Brushed Finish

Bracelet

• Solid 316L Stainless Steel
• Full Brushed Finish
• Polished Chamfer Design
• Approx. 200mm / 7.87in Length
• 38mm Version: 20mm → 16mm
• 42mm Version: 21mm → 16mm

Clasp

• Upgraded On-The-Fly Adjustable Clasp
• San Martin Hexagon Logo

Water Resistance

• 20Bar / 200 Meters

Weight

• 38mm: Approximately 145g
• 42mm: Approximately 174g

Warranty

• 2 Years

38mm vs. 42mm San Martin SN0126G – Which One Should You Choose?

Both versions offer the same core design and mechanical experience, so the decision mainly comes down to wrist presence and personal preference.

Choose the 38mm San Martin SN0126G if you prefer a compact, slimmer dive watch that's comfortable for everyday wear. At only 11.7mm thick, it also offers a relatively sleek profile for a 200M automatic diver.

Choose the 42mm San Martin SN0126G if you enjoy a larger sports watch with stronger wrist presence. Its 50mm lug-to-lug dimension and approximately 174g weight create a more substantial tool-watch feel.

Whichever size you choose, you still get the Miyota 90S5 automatic movement, sapphire crystal, ceramic bezel, 200M water resistance, 3D wave dial, and upgraded OTF clasp.

Why Choose the San Martin SN0126G?

The San Martin SN0126G 38mm/42mm Automatic Dive Watch combines one of the most distinctive dial designs in the collection with specifications designed for real everyday use.

Its key features include:

• Two case sizes: 38mm and 42mm
• Miyota 90S5 automatic mechanical movement
• Enamel 3D wave texture dial
• Multiple gradient dial colors
• 120-click ceramic dive bezel
• Sapphire crystal with AR coating
• BGW-X1 blue lume
• 200M water resistance
• Solid 316L stainless steel bracelet
• On-The-Fly adjustable clasp

The choice between two sizes also makes the SN0126G particularly versatile. Instead of forcing every enthusiast into the same case dimensions, you can choose between a compact everyday diver and a larger, more substantial sports watch.

For anyone searching for a Miyota 90S5 dive watch, 38mm automatic diver, 42mm mechanical dive watch, or San Martin wave dial watch, the SN0126G deserves a closer look.