Dumoreau DM01vsLe Forban Sécurité Mer La Rochelaise
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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.

DM01

La Rochelaise
Diameter
38.6mm
39mm
Lug-to-Lug
46.7mm
46mm
lowest
Thickness
9.8mm
lowest
11.4mm
Water Resistance
100m
150m
highest
Power Reserve
42h
42h
Movement
Miyota 9039
Miyota 9039
Case
6 specsCrystal & Dial
1 specsMovement
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Dumoreau DM01 is widely praised for its sophisticated design and value, featuring a 38.6mm case that reviewers find well-proportioned for most wrists. Owners highlight the beauty of its copper and blue dials, with one noting the unique grenade-patterned dial. Some community members observe design influences from iconic Genta sports watches, while others find the lettering on the copper dial lacks legibility due to insufficient contrast. On balance, owners and reviewers rate the Dumoreau DM01 highly for its refined aesthetic and unique dial execution at its price point.
Le Forban Sécurité Mer La Rochelaise is praised for its well-considered 39mm geometry that allows it to wear thin, its use of a no-date Miyota 9039 movement without a ghost position, and its overall compelling package for the price. Owners consistently highlight its vintage proportions, excellent legibility, and comfortable wearability, with one owner noting it runs within COSC specifications. The inner rotating bezel is described as original, and the ocean-green dial is a point of appreciation, with one owner receiving many compliments. The price of €740 on strap and €790 on bracelet is considered on the higher end for revived microbrands, though not unreasonable, with some owners feeling it is too expensive for a Miyota movement. Criticisms include a desire for more signature on the secondary crown and a dislike for the red seconds hand from multiple owners.
The compressor case design is a shared strength. Reviewers did not agree on a specific weakness.
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