Side by side

Halios Seaforth IVvsSeiko King Seiko KSK

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300

At a glance

15 of 29 specs differ
Diameter
Seaforth IV40mm
King Seiko KSK38.6mm
Power Reserve
Seaforth IV40h
King Seiko KSK45h
Water Resistance
Seaforth IV200m
King Seiko KSK50m
MSRP
Seaforth IV$765
King Seiko KSK$3,300

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
40mm
38.6mm
Thickness
12.4mm
10.7mm
Lug-to-Lug
46.5mm
45.8mm
Lug Width
20mm
19mm
Material
Titanium
Stainless Steel
Water Resistance
200m
50m

Crystal & Dial

4 specs
Crystal
Sapphire (double-domed)
Sapphire
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Blue
Black

Movement

3 specs
Caliber
Sellita SW200-2
6L35
Power Reserve
40h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$765
$3,300

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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 King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

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