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 grey grade 5 (bracelet grade 2) case. It measures 39.0 mm across, 12.8 mm thick, 47 mm lug to lug, 100.5 g, and is water resistant to 300 m. Inside is the Seiko NH35 automatic movement, with ~41 h power reserve. Complications: Date. Priced from $278 (approx). Brand origin: China.

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

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Alternatives to the San Martin Watchdives SN0121T Titanium 39mm

Hamtun Kraken H3HamtunKraken H3$31541.0 mmDiversame category · same style · shared complications · similar price
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RDUNAER1 Titanium Emperor Tuna$229.952.0 mmDiversame category · same style · shared complications · similar priceAragon Virtuoso Ti 9015AragonVirtuoso Ti 9015$33044.0 mm15 mm thick170 gDiversame category · same style · shared complications · similar price

More titanium and ceramic watches from San Martin

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San MartinTitanium Military Pilot SN030-T$19939.0 mmPilot
San MartinETA 7753 Titanium Chronograph$1,51445.0 mmChronograph
San 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 grey grade 5 (bracelet grade 2) 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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