Serket Watch Co Reef MarianavsDOXA SUB 250T GMT

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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.

Serket Watch Co Reef Mariana at true scale

Reef Mariana

DOXA SUB 250T GMT at true scale

SUB 250T GMT

Diameter

40mm

40mm

Lug-to-Lug

47.5mm

n/a

Thickness

13.2mm

n/a

Water Resistance

200m

250m

highest

Power Reserve

n/a

50h

MSRP

$449

lowest

$2,790

Movement

Seiko NH35

Automatic

Case

4 specs
Thickness
13.2mm
n/a
Lug-to-Lug
47.5mm
n/a
Lug Width
20mm
n/a
Water Resistance
200m
250m

Crystal & Dial

3 specs
AR Coating
n/a
Yes
Dial Color
Orange
Aquamarine
Lume
BGW9
None

Movement

2 specs
Caliber
Seiko NH35
n/a
Power Reserve
n/a
50h

Pricing

1 specs
MSRP
$449
$2,790
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Reviews

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

Serket Watch Co Reef Mariana

Owners widely praise the Serket Watch Co Reef Mariana for its excellent value, citing the sapphire crystal, ceramic bezel, and reliable Seiko NH35 automatic movement at its price point. Some owners note the bezel turns too easily and suggest the lume could be stronger. Overall, owners rate the Serket Watch Co Reef Mariana highly for its eye-catching dial and bezel combination and strong feature set for the price.

DOXA SUB 250T GMT

The DOXA SUB 250T GMT is widely praised for its compact 40mm case, slim 10.85mm thickness, and sub-43mm lug-to-lug measurement, making it exceptionally comfortable and wearable. Reviewers highlight its functional GMT complication, precise bezel action, and the classic Doxa design language, noting its competitive pricing around €2,550 or $2,450. The skeletonized GMT hand is a point of discussion, with some finding it quirky or less intuitive, though others note it looks better in person and is easy to ignore for dive purposes. The watch is available in nine dial colors, with specific limited editions carrying a slight premium. Overall, reviewers rate the DOXA SUB 250T GMT highly for its wearable dimensions and value proposition as a capable dive watch with added GMT functionality.

From video reviewers

The watch's refined and wearable 42mm case size is a strength. Reviewers noted the iconic Doxa aesthetic combined with GMT functionality. No shared weaknesses were identified.