Fortis Marinemaster M-40vsNezumi Studios Baleine
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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

Baleine
Diameter
40mm
40mm
Lug-to-Lug
n/a
47mm
Thickness
13mm
12.1mm
lowest
Water Resistance
300m
highest
200m
Power Reserve
38h
42h
highest
MSRP
$3,520
$821
lowest
Movement
Sellita SW220-1
Miyota 9039
Case
4 specsCrystal & Dial
2 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.
Owners widely praise the Nezumi Studios Baleine for its stylish design updates, comfortable 40mm case size, and the soft feel of its strap, with one owner noting its striking appearance garners significant attention. Reviewers highlight its exceptional value, with the automatic version priced competitively, and appreciate the coin-edged bezel action. The watch features a boxed sapphire crystal, signed crown, buckle, and case back, and a textured matte black dial with applied numerals filled with warm-toned lume. Accuracy figures for the Miyota 9039 movement are stated as -10/+30 seconds per day, though actual performance is expected to be better, with one owner reporting initial fast running that settled. Some owners find the 40mm size ideal, while one wished for a smaller case. The gold DLC coating is a matter of personal preference, though it is acknowledged to be eye-catching. The included leather strap did not hold up well to sunscreen for one owner.
The cohesive, original vintage-inspired design is the primary strength. Lume performance is a weakness.
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