The Titanium Field GuidePicks of the month

Synchron Ti300M Poseidon

The Synchron Ti300M Poseidon is a 41 mm Grade 5 titanium dive watch with a La Joux-Perret G100 automatic movement. At 50 g, it is lighter than 95% of the 102 titanium dive watches weighed without a bracelet.

All Synchron watchesDiver watchesUnder $3,000MicrobrandLightweightLightest, rankedGrade 5 titanium
Price
$1,290
Material
Titanium
Grade / type
Grade 5
Weight
50 g
Water resistance
300 m
Type
Diver
Case diameter
41.0 mm
Thickness
11.9 mm
Lug-to-lug
45 mm
Origin
Switzerland
Movement
Automatic
Caliber
La Joux-Perret G100 (Soigne)
Power reserve
68 h
Complications
Date
Colour
Grey
Surface treatment
Brushed
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Unconfirmed (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Genuine Tropic rubber strap, 20 mm lug width
Crystal
Sapphire
Display back
No
Dial
Sunshine yellow, semi-glossy, with applied markers
Dial colours
Yellow
Lume
Super-LumiNova X1
Availability
Offered
Status
Current (second batch, ready to ship early September 2026)
Not published
Reference, Hardness, Construction, Matching bracelet
High confidence Verified Aug 2026 Source: Synchron (maker technical specifications) / Two Broke Watch Snobs
Facts are free to cite with a link.
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Alternatives to the Synchron Ti300M Poseidon

Certina DS Action Diver 40.5mm TitaniumCertinaDS Action Diver 40.5mm Titanium$1,07540.5 mm14.1 mm thick124 gDiversame category · same style · shared complications · similar priceVarius SeekVariusSeek$1,09542.0 mm13.4 mm thick130 gDiversame category · same style · shared complications · similar priceCertina DS Action Diver 38mm TitaniumCertinaDS Action Diver 38mm Titanium$1,10038.0 mm13.2 mm thick86 gDiversame category · same style · shared complications · similar priceCitizen Promaster Fujitsubo Platinum DLC (Super Titanium)CitizenPromaster Fujitsubo Platinum DLC (Super Titanium)$1,19541.0 mm119 gDiversame category · same style · shared complications · similar priceOceaneva Deep Marine Explorer II 1250mOceanevaDeep Marine Explorer II 1250m$1,19942.0 mm14.8 mm thick145 gDiversame category · same style · shared complications · similar priceOceaneva Power Reserve 6000mOceanevaPower Reserve 6000m$1,19944.0 mm19.75 mm thick142 gDiversame category · same style · shared complications · similar price

More watches from Synchron

Synchron Ti300M Sealab (Limited Edition)SynchronTi300M Sealab (Limited Edition)$1,49041.0 mm11.9 mm thick50 gDiver
SynchronBronze GMT–39.0 mm10 mm thickOther

Frequently asked questions

What grade of titanium is the Synchron Ti300M Poseidon?

Grade 5, as stated by the maker. The caseback is titanium too.

What size is the Synchron Ti300M Poseidon?

The case is 41 mm across, 11.9 mm thick and 45 mm from lug to lug. It is water resistant to 300 m.

How much does the Synchron Ti300M Poseidon weigh?

About 50 g.

How much does the Synchron Ti300M Poseidon cost, and is it available?

It is in production, at a list price of $1,290.

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