The Wristwatch Field Guide

San Martin Watchdives SN0121T Titanium 39mm

The San Martin Watchdives SN0121T Titanium 39mm is a current-production diver watch with a grade 5 (bracelet grade 2) titanium case. At 100.5 g it sits around the middle for diver watches in the guide, and is priced well under the $1,199 median for the category.

All San Martin watchesExotic-material diver watchesTitaniumDiversUnder $5,000
Price
$278
Material
Titanium
Grade / type
Grade 5 (bracelet Grade 2)
Weight
100.5 g
Water resistance
300 m
Type
Diver
Case diameter
39.0 mm
Thickness
12.8 mm
Lug-to-lug
47 mm
Origin
China
Movement
Automatic
Caliber
Seiko NH35
Power reserve
~41 h
Complications
Date
Colour
Grey
Surface treatment
None; ceramic bezel
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium
Crystal
Sapphire, AR coated
Display back
No
Dial
Matte black / matte blue
Dial colours
Black Blue
Lume
Super-LumiNova BGW9
Availability
Offered
Status
Current
Not published
Reference, Hardness, Construction, Caseback, Matching bracelet
High confidence Verified Jun 2026 Source: San Martin (maker) / Watchdives (maker)
Facts are free to cite with a link.
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Alternatives to the San Martin Watchdives SN0121T Titanium 39mm

KRONOSTI Deep ExplorerKRONOSTIDeep Explorer$22938.0 mm10 mm thickDiversame category · same style · shared complications · similar priceProxima UD1685 Bronze Samurai DiverProximaUD1685 Bronze Samurai Diver$27842.0 mm14 mm thickDiversame category · same style · shared complications · similar priceHamtun Kraken H3HamtunKraken H3$31541.0 mmDiversame category · same style · shared complications · similar price
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More exotic-material watches from San Martin

San Martin SN0111-T GR5 DiverSan MartinSN0111-T GR5 Diver$38940.0 mm13.1 mm thick103 gDiverSan Martin SN027-T3 Grade 5 Titanium Diver 43mmSan MartinSN027-T3 Grade 5 Titanium Diver 43mm$35043.0 mm12.5 mm thick86 gDiverSan Martin Titanium Military Pilot SN030-TSan MartinTitanium Military Pilot SN030-T$19939.0 mmPilotSan Martin ETA 7753 Titanium ChronographSan MartinETA 7753 Titanium Chronograph$1,51445.0 mmChronographSan Martin Retro Titanium Diver SN0125-TSan MartinRetro Titanium Diver SN0125-T$23942.0 mmDiver
San MartinOriginal Design Titanium Diver SN027-T1$43543.0 mmDiver

Frequently asked questions

What is the case material of the San Martin Watchdives SN0121T Titanium 39mm?

The San Martin Watchdives SN0121T Titanium 39mm has a grade 5 (bracelet grade 2) titanium case. This is confirmed against the maker spec.

What size is the San Martin Watchdives SN0121T Titanium 39mm?

It is 39.0 mm in diameter, 12.8 mm thick, 47 mm lug to lug, and water resistant to 300 m.

How much does the San Martin Watchdives SN0121T Titanium 39mm weigh?

About 100.5 g.

How much does the San Martin Watchdives SN0121T Titanium 39mm cost, and is it available?

It is current-production and lists from $278.

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