Seiko Prospex SeavsWhitby Watch Co. Ad Mare Dive Watch

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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.

Seiko Prospex Sea at true scale

Prospex Sea

Whitby Watch Co. Ad Mare Dive Watch at true scale

Ad Mare Dive Watch

Diameter

43.8mm

44mm

Lug-to-Lug

48.7mm

lowest

50.8mm

Thickness

12.8mm

lowest

14mm

Water Resistance

200m

200m

Power Reserve

41h

highest

38h

MSRP

$625

$550

lowest

Movement

Seiko 4R35

Sellita SW200-1

Case

3 specs
Diameter
43.8mm
44mm
Thickness
12.8mm
14mm
Lug-to-Lug
48.7mm
50.8mm

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
n/a
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 4R35
Sellita SW200-1
Power Reserve
41h
38h
Jewels
23
0

Pricing

1 specs
MSRP
$625
$550
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Reviews

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

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value as a sport watch, with owners highlighting its comfortable wearability and generous lume. Reviewers note its solid build quality and attractive design, with some specifically mentioning the matte black dial as a strong point. One owner reports accuracy around +1 to +2 seconds per day. The 43.8mm case size is considered substantial by some, and one owner found the watch heavy and thick, regretting not choosing a different variant. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its blend of classic design and modern utility at an accessible price point.

Whitby Watch Co. Ad Mare Dive Watch

Owners widely praise the Whitby Watch Co. Ad Mare Dive Watch as a solid dive watch for its price, with multiple users calling it the best deal under $600 and one rating it 8.5 out of 10. Reviewers note its substantial feel, quality construction, and crisp dial with applied indices, powered by a Sellita SW200-1 automatic movement. Some owners find the 44mm case size to be a comfortable daily wear, with one mentioning the sanded texture of the titanium variant keeps it light. Drawbacks noted by one owner include the absence of a date wheel. Overall, owners and reviewers rate the Whitby Watch Co. Ad Mare Dive Watch highly for its value and build quality at its price point.