Fortis Marinemaster M-40vsSynchron Sealab Ti300M
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Marinemaster M-40

Sealab Ti300M
Diameter
40mm
41mm
Lug-to-Lug
n/a
45mm
Thickness
13mm
11.9mm
lowest
Water Resistance
300m
300m
Power Reserve
38h
60h
highest
MSRP
$3,520
n/a
Movement
Sellita SW220-1
La Joux-Perret G100
Case
5 specsCrystal & Dial
1 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Fortis Marinemaster M-40 for its gorgeous appearance and strong wrist presence, noting its impressive lume. The watch comes with a bracelet and three rubber straps, including a deployant buckle. On balance, owners rate the Fortis Marinemaster M-40 highly for its aesthetic appeal and comprehensive strap package.
The watch's Swiss Made construction and robust design are consistently praised. Reviewers noted the bracelet as a potential point of contention.
The Synchron SEALAB Ti300M is praised for its 11.9mm brushed Grade 5 titanium case, offering a thinner profile than many dive watches. Owners find enjoyment in its specifications and appearance, noting its resemblance to the Doxa Sub300. The La Joux-Perret G100 movement is highlighted for its Soigné grade finishing and 60-hour power reserve, all presented at a compelling price point. Overall, owners and reviewers rate the Synchron SEALAB Ti300M highly for its comfortable, thinner case design and well-finished movement at the price.
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