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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.
3 Variants
Retail MSRP
$765
Low
—
Avg
—
High
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Static data
Case
40mm
Power Reserve
—
Movement
Automatic
Water Resistance
200m
01
Case Dimensions
Diameter40mm
Thickness12.4mm
Lug-to-Lug46.5mm
Lug Width20mm
02
Case Build
MaterialTitanium
Water Resistance200m
03
Crystal & Dial
CrystalSapphire (double-domed)
Dial ColorSunburst Blue
04
Movement
Caliber
TypeAutomatic
Beat Rate—
Power Reserve—
Jewels—
HackingNo
Hand-WindingNo
ComplicationsTime only
05
Design Language
Dial styleSunburst
BezelFixed
Bracelet / strapRubber strap
HandsBaton
AI-detected from product image · 5/22/2026
In a nutshell
The Halios Seaforth IV (ref. seaforth-iv-gs-sunburst-blue) is an automatic diver watch, with a 40mm titanium case, 12.4mm thick, powered by the Sellita SW200-2 movement. Water resistance is rated to 200m, under a sapphire (double-domed) crystal. Manufacturer MSRP is $765. The dial color is blue.