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Estimated between Oct 11, 2026 and Oct 13, 2026 Ships within 1-3 business day after payment clears. | SHOP Track Order | Ourlum Orders | Track Orders
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Automatic Sapphire Diver, Miyota 90S5 Watch, San Martin 39mm Dive, Guilloche MOP Dial, Luxury Watch. Track time underwater with zero guesswork. Precision mechanics protect your wrist on land or sea.
Your daily companion marries rugged utility with refined artistry. The guilloche mother-of-pearl dial shifts cleanly across black, blue, green, or orange tones. Applied indices catch the sun while GS-crafted hands sweep above clear sight lines. A screw-down crown seals the stem against moisture intrusion. This San Martin diver watch rests lightly at roughly eighty-one grams, balancing comfort with commanding presence.
This mechanical wristwatch serves commuters, field professionals, and collectors who demand dependable engineering. The thirty-nine-millimeter footprint fits gracefully below cufflines or jacket sleeves. You get a twenty-bar rated instrument that performs reliably near shorelines, pools, or office desks. We ship this exact configuration straight to your door.
You read markers instantly during dim lighting thanks to bright BGW-X1 blue lume. The stop-second hand lets you sync the minute dial precisely to official seconds. Extended power reserve covers your sleep cycle without stopping. Trusted sealing holds firm against rain, dishwashing, or splashing waves.
Brushed stainless steel case back safeguards internal gears from dust and humidity. Folded clasp with integrated safety lock keeps the bracelet secure during active movements. Lightweight FKM straps resist sweat, oils, and temperature swings. Luminous dive markers retain charge for long exposures. A dedicated two-year warranty covers production flaws with straightforward claims processing.
One factory-sealed San Martin automatic dive chronometer. Your chosen strap style attaches securely at delivery. Detailed care guide explains proper winding routines. Branded soft pouch prevents surface marks during transit.
Certificate of authenticity verifies genuine Miyota calibration. Polishing cloth removes fingerprints before wear. Travel storage sleeve fits neatly inside glove compartments or backpack pockets.
Rotate the crown clockwise fifteen cycles upon first activation. Pull the stem to position one to advance the date window. Extend the shaft fully to align minutes, then press inward until audible clicks confirm sealing. Keep the unit away from speakers, laptops, and magstripe devices to preserve timing integrity.
You enjoy uninterrupted accuracy through a battery-free automatic system that runs on motion. Flexible styling adapts to formal events or technical errands effortlessly. Rapid strap exchanges eliminate waiting for repairs. Confident sealing removes anxiety during sudden downpours.
Log training splits alongside analog lap timers. Wear beneath tailored coats to signal quiet sophistication. Treat it as a primary daily driver that survives keyboard typing and trail running alike.
Critical thinkers who value transparent construction over marketing noise. Active professionals needing resilient timekeepers for demanding shifts. Givers seeking sophisticated mechanical pieces that impress without excessive pricing.
Wear the piece daily for eight hours so natural arm motion winds the mainspring. If the watch sits unused overnight, turn the crown clockwise fifteen times to restore full energy.
Never advance the date or weekday complication while the internal gear train engages between eight p.m. and four a.m. Forcing those controls during that window stresses the mechanism and may stall future adjustments.
Mild atmospheric condensation usually evaporates within two hours when you wear the watch upside down. Continuous droplets indicate compromised seals and require professional reconditioning.
The rotating ring is crafted from polished sapphire rather than aluminum or titanium, providing deeper scratch resistance and smoother click action.
Coverage addresses internal movement defects and exterior finish irregularities. Normal wear, scratches from impact, or missing crowns fall outside limited warranty terms.
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The watch itself is really good, it’s a good value proposition and the fales i’ve found in it are in one of its most proeminente strengths: the bracelet. the bracelet lacks an edge softening finishing on the inside. causing it to scratch your arm and the clasp it self can hurt your arm if you’re not wearing it loose enough. the pins that hold the clasp closed are protruding into your arm when you’re wearing it. also the clasp quick adjust system is short, doesn’t give enough room for wrist swells. and after this frustration the clasp came with the scratches on the “arm-side”, on the quick adjust button.
Very nice watch, perfect size for my 17cm wrist, the green color is elegant without being too formal, the MOP effect is very subtle.
I finally pulled trigger and ordered san martin for the first time! i’m truly impressed with quality and design of this watch. i saw video review of this green color but it’s so much better in person :)
It's amazing for this price
Incredible watch for the money.
Absolutely amazing. The finishing is impeccable, the bracelet, the dial, the clasp, the bezel - all phenomenal. It looks and feels very luxurious, yet understated. Thank you, san martin!
Impressive watch, sleek and stylish, perfect size for my 17 cm wrist, legible, slight purple color enlightens the dial at certain angles, comfortable tropic bracelet
Great looking sports style divers watch nice thin casewith miyota movement. Lovely subtle iridescent dial with guolloche pattern. Excellent quality bracelet fits wrist well comfortable on wrist great quality watch.
Very good looking!! !
Excellent watch,
+4sec a day,
The size smaller than i thought,
But the thickness is a benefit if you wear
A long-sleeved shirt.
One thing, meanwhile the price get higher and higher.
Why?
This watch is great. the guilloche dial is spectacular. proportions are great and although it’s a smaller watch, it still looks nice on a pretty good sized wrist.
The watch itself is really good. I was disappointed with the bracelet. It looks very nice on the outside, but the screws are very small, and the slot for the screwdriver is very shallow! So it was very difficult for me to unscrew these tiny screws (less than 1 mm) with a micro-screwdriver to shorten the bracelet. It would be better if such thin bracelets were made with pins!!!
Excellent quality keeps accurate time within cosc perimeters in all 5 positions best value watch for sure
Very nice watch, almost high-end. If the glass reflected better, then it would be my current number one ☝️. That's how I see myself when looking directly at it. And the shipping took a very long time compared to others.
Love the watch! Great shipping. Switching from strap to bracelet was a little difficult. Drilled lugs or quick release spring bars would have been great to have.
This watch has so much potential. Truly wonderful bracelet. Clean look with an interesting dial. Great movement and case. But san martin is let down once again by its glass. The (very) blue anti-reflective coating is so thin that the watch is sometimes hard to read. There is so much glare and reflection off the watch face it's almost impossible to appreciate the dial unless the lighting is perfect. All i see is my face most of the time. With more anti-reflective coating, this watch is a gem. Unfortunately, in its current state, it is not great at being a watch.
Very nice watch.
Fit, finish, and styling excellent. Shipping was somewhat slow and the bracelet is difficult to remove if you want a strap change. Recommend drilled lugs or quick release spring bars on the bracelet/ straps
This is a great watch for the money. It’s currently operating at -6s/day. The bracelet is very well finished and the clasp with micro adjustment is better than some of my higher-end watches. The textured dial is nicer than i expected. The case is quite thin. Manual winding feels a bit ‘grittier’ than i would expect, but i guess that’s on miyota, not san martin. The most notable thing for me is the lume. I doubted the claim that genuine superluminova grade x1 was used, but not now. The lume lasts longer than that of my seamaster (grade a). Also, because the bezel is sapphire, not ceramic, the lume in the bezel numbers and markers seems to make the entire bezel glow blue. This is a really nice watch.
Beautiful looking diver. The dial when hit at certain angles with light, looks fantastic. I tried taking pictures, but my phone camera just doesn’t due this watch the proper due it deserves.
I was afraid of the mop, but for nothing; it's neutral. It's a great watch, keep it up! The downsides are that they could use a quick-release bracelet; the edges of the bracelet are a bit sharp at the bottom, and the bracelet screws are flimsy.
Excellent san martin, with a very luxurious dial and all the best quality the chines brand has always implementing.
