Bays Watch Co.

29/05/2026

Deep water energy. This build channels the spirit of the MarineMaster 300 — a matte black dial with that signature MM300 index layout, framed by a coin-edge SS case and blacked-out dive bezel. No flash, no fuss. Just a tool watch that means what it says. 🌊

Tech Specs:

Dial: Matte black, MM300-style with applied BGW9 lume indices
Hands: Broad baton-style with BGW9 lume fill
Bezel: Black ceramic insert with BGW9 lume, 60-minute dive bezel
Case: Polished-brushed SS, coin-edge profile
Bracelet: SS oyster-style with deployant clasp
Movement: NH35A automatic

Independent custom watch – not affiliated with Seiko or Grand Seiko.

15/05/2026

There is a moment in early spring when the forest floor hasn't quite decided whether it's still winter. The frost has retreated, but the canopy holds its breath. The light filters through in fragments — cold and green and impossibly alive.

This build lives in that moment.

The dial is a study in organised chaos — a thousand intersecting lines that scatter light the way bare branches scatter sunlight. No two angles read the same. Morning light pulls it cool and glassy. Evening warmth draws out the depth. It is not simply green. It is the idea of green — the colour of something on the verge of becoming. The gold seconds hand sweeps through it all unhurried, a single thread of warmth against the cool of the forest.

Tech Specs
Dial: GS-inspired "Shunbun" textured green
Hands: Dauphine-style with gold seconds
Case: Zaratsu-inspired 38mm polished-brushed stainless steel
Bracelet: Oyster style stainless steel, mixed finish
Weight: 158g
Movement: NH35 Automatic

Independent custom watch – not affiliated with Seiko or Grand Seiko.

02/05/2026

A nod to one of the most iconic Japanese tool divers ever made — the Seiko Marinemaster 300 SBDX001. This build takes everything that made the MM300 a legend and brings it to life with a clean matte black dial that lets every detail speak for itself. The domed sapphire throws its signature cool blue cast across the surface — a reminder that great tool watches don't need to try hard to look stunning. Up close, every detail earns its place: the chunky knurled bezel ring, the depth of those applied indices, the satisfying heft of the solid bracelet links. A proper professional diver done right.

Tech Specs:
Dial: Matte black, applied C3 lume indices, date at 3
Hands: Broad baton-style, full C3 lume fill
Bezel: 120-click unidirectional ceramic insert, black
Case: Stainless steel, brushed & polished, screw-down crown at 4
Bracelet: Stainless steel oyster-style, solid links
Weight: ~210g (est.)
Movement: Automatic, NH35 movement

Independent custom watch – not affiliated with Seiko or Grand Seiko.

25/04/2026

Where silence settles.

A dial textured like fresh snow — soft, granular, almost untouched. Light diffuses across it like a winter morning, quiet and restrained, never harsh. The bezel frames that stillness in cool contrast — deep cobalt fading into white, like the edge of a frozen horizon.

Polished indices rise through the dial like markers in frost, sharp and deliberate. Then, a break in the calm — subtle flashes of red. The “GMT” text, the tip of the seconds hand. Small, precise, but impossible to ignore.

And when darkness falls, the watch transforms — lume burning with an icy, electric glow, while the blue GMT hand moves steadily across it all, tracking distance in silence.

Cold. Controlled. Alive in the details.

Tech Specs
• Dial: Snow textured silver-white dial, applied indices with BGW9 lume
• Hands: Matte and polished GS-style hands, blue GMT hand with BGW9
• Bezel: Bi-directional cobalt blue/white 24-hour GMT sapphire crystal bezel with BGW9 lume
• Case: Stainless steel 42mm case in MM300 style with brushed and polished finishing
• Bracelet: Oyster-style bracelet with polished centre links
• Weight: ~184g
• Movement: NH34 automatic with GMT function, hacking & hand-winding

Independent custom watch – not affiliated with Seiko or Grand Seiko.

06/04/2026

A study in depth — where the surface meets the unknown. Commissioned as a one-off build, this piece draws from the ocean’s quiet contrasts. The crystallised titanium blue-black dial shifts between open water and the darker depths below, where light begins to disappear and mystery takes over. With every angle, the tones evolve — like currents moving above an endless drop.

The textured, crystallised finish brings that motion to life, giving the dial a layered, almost liquid feel while staying controlled and refined. Sharp indices and polished hands maintain clarity and precision, grounding the organic character of the dial. The case, finished in a mix of brushed and polished surfaces, adds subtle dimension, while the oyster-style bracelet with polished centre links introduces just the right amount of contrast and refinement. Built for daily wear, this is a personal piece shaped by both vision and craft.

Calm on the surface. Depth beneath.

Tech Specs
• Dial: Crystalized titanium blue black dial with gradient depth effect, applied indices
• Hands: Polished dauphine-style hands
• Case: Stainless steel 38mm, brushed and polished finishes
• Bracelet: Oyster-style stainless steel bracelet with polished centre links
• Weight: ~150g
• Movement: NH35 automatic with hacking and hand-winding

Independent custom watch – not affiliated with Seiko or Grand Seiko.

04/04/2026

Where texture meets light.

This ladies' build draws from the quiet artistry that defines Grand Seiko style — where texture is not decoration, but character. The dial, reminiscent of wind-swept snow or carved birch, creates a landscape for light to move across, revealing new details at every angle.

The warmth of the rose gold indices and hands brings contrast against the cool, textured dial. Zaratsu-inspired polishing on the case and bracelet catches light in sharp, deliberate flashes, while the brushed surfaces soften the reflection into a gentle glow. It’s a balance of warmth and restraint.

A framed date window adds structure to the dial, keeping the design grounded and functional — a hallmark of Japanese watch design where beauty always serves purpose.

The crystal introduces another layer of detail — subtle angled reflections along its edge, almost like the facets of a cut diamond. As light hits, it refracts in controlled flashes, adding depth and a quiet brilliance without overpowering the dial.

Elegant. Textured. Intentional.
A BWCo interpretation of the Grand Seiko philosophy — where nature, light, and craftsmanship meet.

Tech Specs
• Dial: Textured white dial with applied rose gold indices
• Hands: Dauphine hands in rose gold finish
• Case: Stainless steel 33mm case with polished finishing
• Bracelet: Stainless steel bracelet with polished center links
• Movement: Automatic NH35 movement with hacking & hand-winding
• Function: Date at 3 o’clock

Independent custom watch – not affiliated with Seiko or Grand Seiko.

WristCheck WatchModding SeikoModding SeikoModders
TexturedDial GrandSeiko JapaneseDesign LightAndTextureth

25/03/2026

09/03/2026

Where sky meets stillness.

This BWCo GMT build captures the quiet beauty of high-altitude skies — where soft layers of clouds stretch endlessly beneath you. The matte ice-blue/white textured dial evokes that tranquil scene, giving the surface a calm depth while keeping the overall look clean and restrained.

Polished indices and dauphine hands rise clearly from the dial, catching light against the cool backdrop. Framing the watch is a crisp blue-and-white 24-hour bezel, while the blue GMT hand adds a subtle accent and practical dual-time functionality for those who move between horizons.

A GMT built around balance — texture, clarity, and cool tones working together in quiet harmony. A travel-ready piece that blends elegance with everyday versatility.

Tech Specs
• Dial: Matte ice-blue/white textured dial with applied indices and BGW9 blue lume
• Hands: Polished dauphine hands, blue GMT hand with BGW9 blue lume
• Bezel: Blue & white 24-hour GMT bezel with green lume
• Case: Polished stainless steel case
• Bracelet: Stainless steel bracelet
• Weight: 176g
• Movement: NH34 automatic with GMT function and date

Independent custom watch – not affiliated with Seiko or Grand Seiko.

23/02/2026

Where shadow meets light.

This build channels the disciplined design language that defines Grand Seiko — sharp geometry, controlled finishing, and light treated as a material of its own.

The two-toned steel case and bracelet shift with every movement. Brushed planes diffuse light like the surface of the moon, soft and restrained. Polished center links and bevels answer back with sudden brilliance — flashes like distant stars against a black sky. It’s not decoration; it’s interplay.

The matte black dial anchors everything in stillness. Faceted dauphine-inspired hands — crisp and angular in true GS spirit — carve through the darkness with precision. Each edge catches light differently, creating that signature shimmer Grand Seiko is known for.

Encircled by a monochrome diver bezel, the watch feels like an eclipse in motion — tension between shadow and illumination, held in perfect balance.

Quiet. Precise. Intentional.
A BWCo interpretation of the Grand Seiko philosophy — where light defines form.

Tech Specs
• Dial: Matte black dial, applied indices with BGW9 blue lume
• Hands: Faceted dauphine, broad-arrow hands with BGW9 blue lume
• Bezel: Black diver ceramic bezel with white markings with BGW9 blue lume pip
• Case: Stainless steel case, brushed with polished accents (two-tone finish)
• Bracelet: Two-tone stainless steel bracelet with polished center links
• Weight: ~156g
• Movement: Automatic NH35 movement with hacking & hand-winding, 40 hour power reserve

Independent custom watch – not affiliated with Seiko or Grand Seiko.

20/02/2026

Deep ocean energy, refined with purpose.

This Bayswatchco build channels the spirit of a modern marine instrument — bold Arabic numerals set against a rich sunburst blue dial that shifts from electric cobalt to inky navy under changing light. The high-contrast chapter ring and diver bezel frame the dial with authority, while polished hands and applied markers keep legibility razor sharp.

Mounted on a fitted black rubber strap, this piece leans into its tool-watch DNA — sporty, confident, and built for everyday wear with a refined edge. A subtle red star detail above the text adds just enough character without overpowering the clean symmetry of the dial.

Tech Specs
• Dial: Sunburst ocean blue dial with applied Arabic numerals and blue lume
• Hands: Polished silver cathedral hands with lume
• Bezel: Black diver-style rotating dual time ceramic bezel
• Case: Brushed stainless steel case with polished accents
• Bracelet: Black fitted rubber strap
• Weight: 105g
• Movement: NH35 automatic with hacking and hand-winding, 40 hour reserve

Independent custom watch – not affiliated with Seiko or Grand Seiko.