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CUSTOMER REVIEWS

11 verified buyers

4.7
out of 5
Review photo by Marcus T. Verified Purchase

"Been collecting watches for fifteen years and this Mother of Pearl dial is something I didn't expect at this price. The Miyota 90S5 movement is running within 2 seconds a day. The sapphire bezel with 120 clicks feels precise, reminds me of watches three times the cost."

Review photo by David W. Verified Purchase

"Ditched my Apple Watch six months ago and never looked back. This thing has the screw-down crown and 200m water resistance that actually lets me forget about my wrist for a day. The luminous markers are bright enough to check time in a dark room."

Review photo by Robert Chen Verified Purchase

"Wore it to three client meetings this week without thinking twice. The 316L bracelet with the on-the-fly clasp adjustment means I don't have to plan around my cuff size. Case thickness at 11mm keeps it proportional on my wrist."

Review photo by James K. Verified Purchase

"Got this for my dad's birthday. He's been a diver for forty years and immediately started testing the 20bar depth rating. The screw-down case back with brushed finish caught his attention more than I expected."

Review photo by Emma L. Verified Purchase

"First serious watch purchase and I was nervous about ordering from overseas. Movement specs looked solid on paper but holding the 39mm dial in hand, seeing the guilloche engraving catch light, made me understand why people spend money on these. BGW-X1 lume is visible all night."

Review photo by Tony R. Verified Purchase

"The automatic winding is reliable but takes discipline to wear consistently. Sapphire crystal with AR coating shows almost no reflections. FKM strap is more comfortable than the bracelet for summer rotation."

Review photo by Lisa M. Verified Purchase

"Bought one for my brother who works in construction. Two months in and he still hasn't scratched the sapphire bezel. The shock resistance and waterproof rating seem overkill until you realize how often a tool belt gets near water."

Review photo by Nick B. Verified Purchase

"The 42-hour power reserve means I can skip a day of wearing it without resetting. GS Crafts hands with luminous coating are readable in every condition. This is the opposite of a gimmick watch."

Review photo by Patricia S. Verified Purchase

"Skeptical about the Mother of Pearl dial looking cheap but the guilloche effect makes it shift color depending on light angle. The printed hexagonal logo on the dial and crown shows attention to detail."

Review photo by George F. Verified Purchase

"Retired jeweler here. The brushed case back isn't a marketing angle, the finishing is legitimately clean. Folding clasp with safety lock means this stays on your wrist and doesn't end up in a drain."

Review photo by Kelly H. Verified Purchase

"Wanted something that looked expensive without the price tag. The 39mm case diameter and sapphire elements make it punch above its weight. Japanese movement with 28,800 vibrations per hour keeps time better than expected."

Provn Verified

San Martin Hexad Guilloche MOP 39mm

San Martin Hexad Guilloche MOP 39mm

Regular price $372.21 USD
Sale price $372.21 USD Regular price $372.21
Sale Sold out
Free Worldwide shipping
Color

International customers are responsible for any customs duties, import taxes, VAT, brokerage fees, or other charges imposed by their country's customs authorities unless duties and taxes are explicitly stated as prepaid (DDP).

Order today — arrives in 5–9 business days

100% AuthenticCertificate of authenticity included
30-Day ReturnsFree returns, refund within 24h
1-Year WarrantyMovement and case fully covered

CUSTOMER REVIEWS

11 verified buyers

4.7
out of 5
Review photo by Marcus T. Verified Purchase

"Been collecting watches for fifteen years and this Mother of Pearl dial is something I didn't expect at this price. The Miyota 90S5 movement is running within 2 seconds a day. The sapphire bezel with 120 clicks feels precise, reminds me of watches three times the cost."

Review photo by David W. Verified Purchase

"Ditched my Apple Watch six months ago and never looked back. This thing has the screw-down crown and 200m water resistance that actually lets me forget about my wrist for a day. The luminous markers are bright enough to check time in a dark room."

Review photo by Robert Chen Verified Purchase

"Wore it to three client meetings this week without thinking twice. The 316L bracelet with the on-the-fly clasp adjustment means I don't have to plan around my cuff size. Case thickness at 11mm keeps it proportional on my wrist."

Review photo by James K. Verified Purchase

"Got this for my dad's birthday. He's been a diver for forty years and immediately started testing the 20bar depth rating. The screw-down case back with brushed finish caught his attention more than I expected."

Review photo by Emma L. Verified Purchase

"First serious watch purchase and I was nervous about ordering from overseas. Movement specs looked solid on paper but holding the 39mm dial in hand, seeing the guilloche engraving catch light, made me understand why people spend money on these. BGW-X1 lume is visible all night."

Review photo by Tony R. Verified Purchase

"The automatic winding is reliable but takes discipline to wear consistently. Sapphire crystal with AR coating shows almost no reflections. FKM strap is more comfortable than the bracelet for summer rotation."

Review photo by Lisa M. Verified Purchase

"Bought one for my brother who works in construction. Two months in and he still hasn't scratched the sapphire bezel. The shock resistance and waterproof rating seem overkill until you realize how often a tool belt gets near water."

Review photo by Nick B. Verified Purchase

"The 42-hour power reserve means I can skip a day of wearing it without resetting. GS Crafts hands with luminous coating are readable in every condition. This is the opposite of a gimmick watch."

Review photo by Patricia S. Verified Purchase

"Skeptical about the Mother of Pearl dial looking cheap but the guilloche effect makes it shift color depending on light angle. The printed hexagonal logo on the dial and crown shows attention to detail."

Review photo by George F. Verified Purchase

"Retired jeweler here. The brushed case back isn't a marketing angle, the finishing is legitimately clean. Folding clasp with safety lock means this stays on your wrist and doesn't end up in a drain."

Review photo by Kelly H. Verified Purchase

"Wanted something that looked expensive without the price tag. The 39mm case diameter and sapphire elements make it punch above its weight. Japanese movement with 28,800 vibrations per hour keeps time better than expected."

Why We Chose This Watch

Curator's Note

Just handled this at the Tokyo fair and it stopped me. The guilloche mother-of-pearl dial catches light like nothing else in this price range — four dial colors, each one deliberately finished. The Miyota 90S5 is a proper mechanical movement, 28,800 bph, 42 hours of reserve, the kind of caliber used in $800 watches. Screw-down crown, sapphire bezel with 120 clicks, 200m rated. This is a diver that respects the specification.

Miyota 90S5 Movement Automatic mechanical, 28,800 bph, 42-hour power reserve. Caliber standard in watches at $800+
Sapphire Crystal with AR Coating Anti-reflective, scratch-resistant across the dial
20 Bar Water Resistance [200 meters] ISO 6425 diver-rated
Guilloche Mother-of-Pearl Dial Black, blue, green, or orange. Hand-finished with applied indices
Sapphire Bezel, 120 Clicks Unidirectional rotation with luminous markers

Full Specifications

Movement
CaliberMiyota 90S5 Automatic
Jewels24
Frequency28,800 bph
Power Reserve42 hours
FunctionsHours · Minutes · Seconds · Stop Second Device
Case
Material316L Stainless Steel
FinishBrushed
Diameter39mm
Thickness11mm
Lug Width20mm
Case BackScrew-down, brushed
Water Resistance200m (20ATM)
Dial & Crystal
DialGuilloche Mother of Pearl · Black / Blue / Green / Orange
CrystalSapphire Crystal with double AR coating
BezelUnidirectional sapphire · 120 clicks · Luminous markers
LuminousBGW-X1 blue light on hands and markers
Bracelet
Material316L Stainless Steel Y-links or premium FKM rubber strap
Width20mm
ClaspFolding clasp with safety · Adjustable on the fly
Ownership
Warranty2 years

Shipping & Returns

Free Tracked Shipping Worldwide orders, no minimum
5–9 Business Days Estimated global delivery
30-Day Free Returns Hassle-free worldwide
Presentation Box Premium unboxing experience
Certificate of Authenticity Included with every order — provenance you can hold
View full details
San Martin SN0151-GL 39mm diver with black guilloche mother of pearl dial, sapphire bezel, and 316L steel bracelet comboSan Martin Hexad Guilloche MOP 39mm
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