The Titanium Field Guide

Synchron Ti300M Poseidon

The Synchron Ti300M Poseidon is a current-production diver watch with a grade 5 titanium case, finished with brushed. At 50 g it sits among the lighter diver watches in the guide, and is priced close to the $1,299 median for the category.

All Synchron watchesWatch diver 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

Varius 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 priceCertina DS Action Diver 40.5mm TitaniumCertinaDS Action Diver 40.5mm Titanium$1,11640.5 mm14.1 mm thick124 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)$1,39041.0 mm11.9 mm thick50 gDiver
SynchronBronze GMT–39.0 mm10 mm thickOther
SynchronBathyscaphe 100 Bronze–Diver

Frequently asked questions

What is the case material of the Synchron Ti300M Poseidon?

The Synchron Ti300M Poseidon has a grade 5 titanium case with a titanium caseback. This is confirmed against the maker spec.

What size is the Synchron Ti300M Poseidon?

It is 41.0 mm in diameter, 11.9 mm thick, 45 mm lug to lug, and 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 current-production and lists from $1,290.

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