Serket Watch Co Reef X DivervsSeiko Prospex Sea
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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.

Reef X Diver

Prospex Sea
Diameter
43mm
41.3mm
Lug-to-Lug
50mm
48.2mm
lowest
Thickness
12.7mm
12.5mm
lowest
Water Resistance
200m
300m
highest
Power Reserve
n/a
72h
MSRP
$499
lowest
$1,100
Movement
Seiko NH35
Seiko 6R55
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Serket Watch Co Reef X Diver as an exceptional tool for diving, even when compared to significantly more expensive timepieces. Reviewers note its attractive aesthetics, highlighting pleasing details and a slim bezel design. Overall, owners rate the Serket Watch Co Reef X Diver highly for its functional excellence and appealing visual design at its price point.
Owners and reviewers widely praise the Seiko Prospex Sea for its robust build quality and fair price, with many noting its comfortable silicone strap. Some owners find the watch's size, thickness, and weight to be uncomfortable for smaller wrists, while others consider the size perfect. The consensus is that the Seiko Prospex Sea offers excellent value and build quality for its price.
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