Seiko Prospex SeavsZelos Hammerhead V3 300m Titanium

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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

Zelos Hammerhead V3 300m Titanium at true scale

Hammerhead V3 300m Titanium

Diameter

43.8mm

44mm

Lug-to-Lug

48.7mm

n/a

Thickness

12.8mm

lowest

13mm

Water Resistance

200m

300m

highest

Power Reserve

41h

n/a

MSRP

$625

$559

lowest

Movement

Seiko 4R35

Seiko NH35

Case

5 specs
Diameter
43.8mm
44mm
Thickness
12.8mm
13mm
Lug-to-Lug
48.7mm
n/a
Material
Stainless Steel
Titanium
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
Ti - Mosaic MOP
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 4R35
Seiko NH35
Power Reserve
41h
0h
Jewels
23
0

Pricing

1 specs
MSRP
$625
$559
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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.

Zelos Hammerhead V3 300m Titanium

The Zelos Hammerhead V3 300m Titanium is widely praised for its exceptional lume, unique and beautiful dial finishing that reflects light dramatically, and solid build quality that exceeds its price point. Owners also highlight its comfortable wearability, especially the lightweight titanium variant, and the convenient on-the-fly micro-adjustment on the bracelet. One owner notes the Japanese movement performs better than anticipated, and the Ti-Damascus variant features a unique, patterned dial and bezel. However, some owners find the 44mm size large, the crown "off," and the bracelet clasp could be more scratch-resistant, with resizing pins described as stubborn. Reattaching the bracelet after removal is also noted as extremely difficult. Overall, owners rate the Zelos Hammerhead V3 300m Titanium highly for its impressive dial aesthetics and value for money.

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