Aera Instruments D-1 DivervsAquastar Benthos Professional

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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

Aquastar Benthos Professional at true scale

Benthos Professional

Diameter

44mm

42mm

Lug-to-Lug

49.5mm

n/a

Thickness

15.9mm

13.7mm

lowest

Water Resistance

300m

300m

Power Reserve

41h

n/a

MSRP

$3,200

n/a

Movement

Sellita SW200-1

Sellita SW200-1

Case

5 specs
Diameter
44mm
42mm
Thickness
15.9mm
13.7mm
Lug-to-Lug
49.55mm
n/a
Lug Width
22mm
n/a
Material
Titanium
Stainless Steel

Crystal & Dial

2 specs
Dial Color
n/a
Black
Lume
None
X1 Super-LumiNova

Movement

1 specs
Power Reserve
41h
n/a

Pricing

1 specs
MSRP
$3,200
n/a
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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.

Aquastar Benthos Professional

The Aquastar Benthos Professional is widely praised for its significantly slimmer 13.9mm case, which contributes to comfortable everyday wear and a sleek profile, and its ultra-legible dial. Reviewers note its well-tensioned bezel and an improved beads-of-rice bracelet. Some find the 42mm case size substantial for a dive watch, and its 38-hour power reserve is considered unremarkable. The watch is priced at $1,290 during pre-order. Overall, owners and reviewers rate the Aquastar Benthos Professional highly for its comfortable wearability and legible dial at the price.