Seaforth IV
$765223
40 mmAutomatic200 m WRSapphire
The Sensei's take
The Halios Seaforth IV is an excellent choice for those seeking a lightweight and durable dive watch. Its top-notch materials and reliable Swiss movement represent great value for money in the microbrand space.
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DETAILS: › CASE MATERIAL: Titanium › BRACELET MATERIAL: Titanium with stainless steel clasp › DIAMETER: 40mm (fixed bezel) or 41mm (rotating bezel) › WATER RESISTANCE: 20 ATM. Screw-down crown, screw-down caseback › LUG-TO-LUG: 46.5mm › LUG WIDTH: 20mm › THICKNESS: 12.4mm including crystal › ROTATING BEZEL: 120 stops, unidirectional › CALIBRE: SELLITA SW200-2 self-winding movement, no-date only › POWER RESERVE: 65 hours › DIAL MATERIAL: Brass with galvanic (electrochemical) treatment › LUMINOUS MATERIAL: Globolight XP dial markers, Superluminova C3 X1 (blue) › ROTATING BEZEL INSERT: Sapphire, with luminous markings › CRYSTAL: Sapphire, double-domed with anti-reflective coating › HANDS FINISHING: Sandblasted matte grey › DEFAULT STRAP COLOURS: Black rubber for Plum dial, Blue rubber for Blu…
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At a glance
Strengths & trade-offs
Pulled straight from the spec sheet, framed for the buyer. The editorial verdict is the Sensei's take above.
Strengths
- Upper-tier movement
- Serious water resistance (200m)
- Scratch-resistant sapphire crystal
- Versatile 40mm case
- Luminous dial and hands
Trade-offs
- Priced above what the spec suggests
- Currently sold out
Sensei Says
The specs, in plain English
The movement
Sellita SW200-1. An upper-tier movement: tighter regulation, better materials and a longer power reserve. You feel the quality in the winding and the rate.
On the wrist
At 40 mm it lands in the modern sweet spot, a 46.5 mm lug-to-lug suits most wrists.
The value
Fairly priced for what it is.
On the wrist
How will this watch fit me?
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Wrist circumference
Preferred fit
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Specifications
- Released
- 2026
- Production
- Current production
- Movement
- Automatic
- Calibre
- Sellita SW200-1
- Movement tier
- Upper-tier
- Power reserve
- 38 h
- Case diameter
- 40 mm
- Lug-to-lug
- 46.5 mm
- Thickness
- 12.4 mm
- Lug width
- 20 mm
- Case shape
- Round
- Case material
- Stainless Steel, Titanium
- Water resistance
- 200 m
- Crystal
- Sapphire · anti-reflective
- Bezel
- Dive (unidirectional)
- Caseback
- Closed
- Dial finish
- Brass With Galvanic Treatment
- Indices
- Globolight XP markers
- Lume
- Yes — Super-LumiNova C3
- Strap / bracelet
- Titanium bracelet
- Clasp
- Stainless steel clasp
- Functions
- Self-Winding, No Date
- Fit
- Unisex
The maker
Halios
Design-led, diver-rooted, deliberately scarce.
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