Aera Instruments D-1 DivervsFortis Marinemaster M-44

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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.

Aera Instruments D-1 Diver at true scale

D-1 Diver

Fortis Marinemaster M-44 at true scale

Marinemaster M-44

Diameter

44mm

44mm

Lug-to-Lug

49.5mm

n/a

Thickness

15.9mm

14mm

lowest

Water Resistance

300m

300m

Power Reserve

41h

highest

38h

MSRP

$3,200

lowest

$5,120

Movement

Sellita SW200-1

Sellita SW220-1

Case

3 specs
Thickness
15.9mm
14mm
Lug-to-Lug
49.55mm
n/a
Material
Titanium
Stainless Steel

Crystal & Dial

1 specs
Dial Color
n/a
Orange

Movement

4 specs
Caliber
Sellita SW200-1
Sellita SW220-1
Beat Rate
0 vph
28,800 vph
Power Reserve
41h
38h
Jewels
0
26

Pricing

1 specs
MSRP
$3,200
$5,120
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Aera Instruments D-1 Diver

Owners and reviewers praise the Aera Instruments D-1 Diver for its legible, minimalist design, warm 904L steel case that wears smaller than its 44mm size suggests, and impressive lume application. The stamped dial is noted as unique and creating an optical illusion, while the 120-click bezel feels solid. However, some find the 44mm case size too large and the Sellita SW200-1 movement's accuracy range of ±7 to ±20 seconds per day, along with its 38-hour power reserve, underwhelming for the price. The "ghost" date position on the crown is also cited as a minor oversight. On balance, owners and reviewers appreciate the Aera Instruments D-1 Diver for its comfortable wearability and tool watch functionality at its price point, despite some reservations about the case size and movement.

Fortis Marinemaster M-44

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.

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