Side by side

Halios Seaforth IVvsSeiko Prospex Sea

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

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

Halios Seaforth IV

Owners widely praise the Halios Sunburst Blue for its perfect 40mm size, stunning sunburst dial, and excellent lume, with one owner calling it Halios's best effort and a potential "Omega AT killer." The ETA 2824 movement is noted as running smoothly, and the watch is considered a great value with strong resale. Some owners desire larger sizes or different dial colors, and one reviewer found the Sinn 556i more versatile. The sapphire bezel is described as tall and flat, which is a point of contention for some. Overall, owners rate the Halios Sunburst Blue highly for its design, size, and value.

From video reviewers

The sunburst blue dial is a standout feature. Limited water resistance is a shared concern.

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

At a glance

11 of 29 specs differ
Diameter
Seaforth IV40mm
Prospex Sea41.7mm
Power Reserve
Seaforth IV
Prospex Sea41h
Water Resistance
Seaforth IV200m
Prospex Sea200m
MSRP
Seaforth IV$765
Prospex Sea$595

Full specifications

Case

4 specs
Diameter
40mm
41.7mm
Thickness
12.4mm
12.3mm
Lug-to-Lug
46.5mm
49.5mm
Material
Titanium
Stainless Steel

Crystal & Dial

3 specs
Crystal
Sapphire (double-domed)
Hardlex
Dial Color
Blue
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

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

Pricing

1 specs
MSRP
$765
$595
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