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Estimated between Oct 12, 2026 and Oct 14, 2026 Ships within 1-3 business day after payment clears. | SHOP Track Order | Ourlum Orders | Track Orders
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Experience precision diving with the San Martin 40mm Automatic Watch. Its 300m waterproof housing, sapphire crystal, and genuine Japanese movement deliver reliable performance you can trust daily.
You hold a mechanical tool watch designed for consistent daily wear. The enamel finish sits cleanly behind hardened crystal. Chunky hands sweep over the calendar cutout without visual overlap. The updated clasp adjusts quickly while sitting on your arm. Careful brushing highlights every metal curve along the band.
This diver blends classic luxury styling with everyday durability. You receive a fully assembled timepiece ready for active routines. The rounded forty millimeter shell swings cleanly under firm shirt cuffs.
The self-winding engine eliminates battery replacements entirely. Tight thread seals keep salt spray away from delicate gears. Substantial bracelet mass dampens impact during clumsy desk work. You rely on the rolling date module for complex scheduling.
A Japan-origin YN55 caliber drives smooth second hand motion. Embossed shark imagery adorns the sealed case rear glass. The signature hexagon emblem crowns the twisting grip surface. Zero hour index aligns precisely for tracking sprint laps.
Measurements span forty millimeters across with thirteen point one millimeters height. Strap anchors measure twenty millimeters wide for quick exchanges. Total bracelet length reaches two hundred millimeters for secure wrapping. Overall mass settles near one hundred seventy two grams. Factory coverage extends two full years from purchase.
The box arrives with the completed watch prepared for immediate wear. Standard registration sheets support future servicing requests. Internal assemblies clear rigorous factory inspection thresholds before packing.
Wind the head clockwise fifteen rotations if starting fresh operation. Shift markers only between eight am and four pm to guard gears. Slide the micro-adjust tabs to loosen the clasp midday. Rest a fogged unit face down on clean skin to dry vapor naturally.
Steady timekeeping syncs perfectly without digital interruptions. Hardened metals deflect scratches from routine commute chores. Balanced weight distribution prevents arm fatigue during long shifts. You project professional confidence across boardrooms and coastal trips.
Check interval depths while surfing or navigating rocky coastlines. Wear it Tuesday through Thursday for sharp business casual looks. Slip it over denim sleeves for relaxed weekend adventures. Take it camping where airborne grit might foul lighter instruments.
Shoppers seeking dependable mechanics instead of flashing screens. Professionals needing instant daylight reading during evening hours. Adventurers demanding robust seals without inflated retail markups. Enthusiasts valuing fine brushwork and heavyweight finishing techniques.
Can the luminescent compound fade after sunlight charging? Yes, the specialized mixture absorbs ambient photons then releases steady illumination through extended darkness.
Does the quick-release slider feel bulky overnight? The refined micro adjustment design minimizes bulk and lies completely flat during sleep cycles.
Will the ceramic surface discolor after ocean exposure? No, the fused polymer layer remains chip resistant and pigment stable after years of marine contact.
How does the lug spacing affect wrist comfort? The forty-six point five millimeter spread allows natural swing motion across average forearm widths.
Will the calendar wheel jam after midnight adjustment? Delay setting markers until morning hours to preserve internal clutch alignment permanently.
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Superb quality watch from san martin, have a few now and they keep getting better every time
Good and high-quality products from a reliable supplier. i am completely satisfied with both the product and the speed of shipping and delivery. so i recommend this product and the seller. i hope this will not be my last purchase from this seller.
A very nice watch. it is suitable for every kind of the wrist i.e. small, medium, large ones.
// overall: excellent watch, well priced, nice lacquer (which is an improvement on the gs' matte charcoal), and the proportions work a bit better than on the 44mm version from san martin. I think the case finishing is incredible, overall weight, size, and bezel action to be really nice.
// cons: the deburring of the bezel notches is poor. If you quickly scrape the edge of the bezel against fabric it will cut it. I like a little bit of "catch", but this is too much.
// additional things i would change: i think increasing the size of the circular hour markers a bit (to be more proportionate to the 12/6/9 markers), moving the date window outboard several millimeters (to be more symmetrical with the 9 o'clock hour marker) and increasing the width of the bezel by 1-2mm (making the watch 41mm or 42mm) would make it into a perfect san martin diver, and i would buy not only the black one, but also the blue and also a deep marine green (if they made it). That would be killer.
Excellent quality. well balanced watch. feels perfect on my wrist. too many details to mention. seller was very helpful in purchase and delivered on time.
Excellent quality of the bracelet, case, and bezel. Great mechanics at an excellent price; I've been wanting to try San Martin for a long time, they are wonderful.
Like any sanmartin excellent!! A note,...i have many expensive watches but this is the best and smoothest bezel of all so far. It is a pleasure to play with it. Please note that you have to pay about €53 extra in tax at customs in the netherlands. Many thanks to sanmartin!! !
Do not buy the 40mm version if you have small wrists. You can only remove 4 links (seller confirmed this after i asked). The watch head fits fine on my 16cm wrist but the bracelet can not be shortened enough. Maybe you could remove a link that should not be removed but you risk messing up the bracelet. The watch head itself is nicely finished though. It’s a shame they made a smaller version for smaller wrists that cannot be shortened enough.
Full guarantee. What more can be said? It's a san martín. 1000% recommended, don't hesitate to buy it. Excellent seller. Excellent customer service.
Impeccable, you are great. Surprised by the quality for this price, bravo!!!
This 40mm version is a balanced option - i have the 44mm version as well - this one has the more standard proportions, with a balance between the markers, hands, and the beautiful black enamel dial. The bracelet with screw links is also superior to the 44 mm version, and the quick-adjustment clasp works well—nice and smooth—great value for a gs lover.
Nice
Beautiful watch. Finish impressive. Bezel action 4/5 moves easily, not like others sm i own. Bracelet quality superb, specially the micro adjust on the clasp.
“as usual, san martin doesn’t disappoint. I just wish it were a bit thinner — and this one is a true strap monster.”
This was my first san martin watch and i was very pleasantly suprised! the fit and finish is superb and does not take a backseat to any watchmaker out there selling at 4 and 5 times the price. i really want the sn0009 in the 44mm edition and i don't know if they plan on making any more or not. i certainly hope they will make some more available with a good miyota 9000 series movement or similar quality. i am 6'-4" and the 40mm looks a little small on me and the original homage was to a grand seiko 44mm watch. hopely you will make more san martin!
Polish is best in class. hands alignment is below average. overall very happy and recommend it.
Very nice watch this is my third san martin and the quality is really excellent for the money you pay. it was really quick shipping too, and has come well before the estimated date window i was given. very happy customer thank you!!
Very good. the product is exactly as described and the quality is fantastic. it’s a great watch.
High quality overall, with a bracelet that’s comfortable on the wrist and easily adjustable for a perfect fit. The watch strikes a great balance—stylish yet understated—and the bezel turns smoothly and feels well aligned.
My only suggestion is that the bezel edges are a bit sharp; this is an area where san martin could improve for a more refined finish.
Ok, great qualty, very nice.
But (imho) - the first model with 44mm was a little to large.
And this one (imho) - is a bit to small.
(imho) - it shoud be exact 42 mm.
