Side by side

Halios Seaforth IVvsGrand Seiko SLGH005

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
SLGH005
Grand SeikoSLGH005
MSRP $9,800

At a glance

12 of 29 specs differ
Diameter
Seaforth IV40mm
SLGH00540mm
Power Reserve
Seaforth IV40h
SLGH00580h
Water Resistance
Seaforth IV200m
SLGH005100m
MSRP
Seaforth IV$765
SLGH005$9,800

Full specifications

Case

6 specs
Category
Diver
Dress
Thickness
12.4mm
11.7mm
Lug-to-Lug
46.5mm
47mm
Lug Width
20mm
22mm
Material
Titanium
Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Sapphire (double-domed)
Sapphire
AR Coating
Inner
Yes
Dial Color
Blue
Black

Movement

2 specs
Caliber
Sellita SW200-2
9SA5
Power Reserve
40h
80h

Pricing

1 specs
MSRP
$765
$9,800

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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.

Grand Seiko SLGH005

The Grand Seiko SLGH005 is widely praised for its stunning "White Birch" textured dial, exceptional finishing including mirror-polished indexes and Zaratsu polishing, and the innovative Caliber 9SA5 movement. Owners and reviewers consistently highlight the dial's texture and the elaborate, mirror-like indexes. The watch's 40mm stainless steel case is noted for its slender, sporty design and comfortable wearability, with some finding its size well-proportioned and its brushed and polished surfaces practical for hiding scratches. The 9SA5 movement is recognized for its 80-hour power reserve and 36,000 vph hi-beat frequency, though one owner found its finishing less impressive than other movement types in a similar price bracket. Some reviewers consider its price somewhat high relative to alternatives and desire a micro-adjustable bracelet. On balance, owners and reviewers rate the Grand Seiko SLGH005 highly for its exquisite dial and finishing, powered by an advanced high-beat movement.

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