Fortis Marinemaster M-44vsSeagull Ocean Series Ultra 1000m Waterproof Helium Valve Design Integrated Rotating Bezel Diving 45mm
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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-44

Ocean Series Ultra 1000m Waterproof Helium Valve Design Integrated Rotating Bezel Diving 45mm
Diameter
44mm
45mm
Lug-to-Lug
n/a
50mm
Thickness
14mm
lowest
15.8mm
Water Resistance
300m
1000m
highest
Power Reserve
38h
n/a
MSRP
$5,120
$875
lowest
Movement
Sellita SW220-1
Seagull ST2130
Case
4 specsCrystal & Dial
1 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners praise the Fortis Marinemaster M-44 for its gorgeous appearance, significant wrist presence, and "crazy lume." Reviewers highlight its excellent build quality, COSC-certified movement accuracy of 0 seconds per day, and surprisingly comfortable 44mm case despite its 14.4mm thickness. One reviewer noted the 21mm lug width as a minor drawback, wishing it were 22mm. Overall, owners and reviewers rate the Fortis Marinemaster M-44 highly for its exceptional build quality and COSC-certified accuracy.
The Seagull Ocean Series Ultra 1000m Waterproof Helium Valve Design Integrated Rotating Bezel Diving Watch 45mm is praised for its fit, finish, and general quality, with one owner comparing it favorably to a Movado Series 800. Reviewers note a well-executed design, a metallic wave pattern on the dial with a blue-to-black gradient, and a domed sapphire bezel as desirable elements. One owner reports the ST2130 movement runs at +3 seconds per day. The watch features a bead-blasted 316L stainless steel case, a 5mm sapphire crystal, and a helium escape valve. Some owners find the 45mm case large but fitting, while others note a 20mm thickness. A reviewer flags excessive text on the dial and case, uneven luminous material application, and a rotating bezel with a slight rattle. One owner notes bezel fading over 5 years of commercial diving. The community is split on the bezel, with some calling the 60-click unidirectional bezel a minor quirk and another mentioning a 12-hour bezel.
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