Halios · Seaforth

Seaforth IV

Name: Halios Seaforth IV
Brand: Halios

Mid-range $600–900

The Halios Seaforth IV GS rotating-bezel configuration is a titanium, no-date diver with a Sellita SW200-2 automatic movement, 65-hour power reserve, double-domed sapphire crystal, 20 ATM water resistance, and Globolight XP dial markers filled with Super-LumiNova C3 X1 (blue). The current official listing prices rotating-bezel rubber-strap configurations at $805 and rotating-bezel titanium-bracelet-plus-rubber-strap configurations at $970, and sells it through Halios's batch ordering model.

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41mm

Case

200m

Water res.

12.4mm

Thick

46.5mm

Lug-to-lug

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Overview

Brand	Halios
Collection	Seaforth
Category	Dive
Released	2026
Price guide	Mid-range · $600–900

Full specification

Specs

Case & dial

Diameter	41 mm
Lug-to-lug	46.5 mm
Thickness	12.4 mm
Lug width	20 mm
Water resistance	200 m
Crystal	sapphire, double-domed with anti-reflective coating
Case material	titanium
Bezel	120-click unidirectional rotating bezel with sapphire insert and luminous markings
Case back	screw-down

Movement & furniture

Type	Automatic
Caliber	Sellita SW200-2 POWER+ →
Power reserve	65 h
Jewels	26
Lume	Globolight XP dial markers, Super-LumiNova C3 X1 (blue)
Strap / bracelet	rubber strap (titanium bracelet + rubber strap package option)

On the wrist

At 41mm and 12.4mm thick, the rotating-bezel Seaforth IV GS sits in a shrinking category of genuinely wearable titanium divers — compact enough to clear a shirt cuff and short enough across the wrist to avoid the slab-sided feel common in larger sport watches. The 46.5mm lug-to-lug helps it track flush on smaller and medium wrists, and the no-date layout keeps the dial clean. The sunburst galvanic-treated brass dials are the subtle highlight: they carry depth, shifting shade with viewing angle in a way that keeps the dial alive rather than static.

The official specification centers on Globolight XP dial markers, Super-LumiNova C3 X1 (blue), and a 120-click unidirectional rotating bezel with sapphire insert and luminous markings. The acquisition process — batch availability rather than perpetual shelf stock — will frustrate some buyers, but the payoff is a compact diver with the proportions, finishing, and restraint that made the Seaforth line a reference point among microbrand collectors.

Bottom line

A compact, featherlight titanium diver with genuinely exceptional lume and bezel quality for the price — the main friction is its batch-only ordering model, which demands patience.

Highlights

Titanium 41mm rotating-bezel configuration
Sellita SW200-2 / 65h power reserve
Globolight XP dial markers, Super-LumiNova C3 X1 (blue)
120-click unidirectional sapphire bezel
20 ATM / screw-down crown & caseback

Who it's for

Buyers seeking a compact, enthusiast-focused titanium diver around the current $805-$970 official rotating-bezel listing price who value clean no-date dials, strong lume, and meticulous finishing over name-brand recognition. The 46.5mm lug-to-lug keeps the 41mm rotating-bezel Seaforth IV wearable on smaller and medium wrists, and Halios fans comfortable with batch ordering will find the most reward here.

Who should skip it

Skip it if you need a date display, prefer browsing in-store or buying off-the-shelf, or want a fixed-bezel Seaforth IV instead — this record tracks the 41mm rotating-bezel GS configuration from the current official listing.

Before you buy

Batch pre-orders/restocks are announced by Halios; availability varies by configuration
Titanium bracelet is available as a Titanium Bracelet + Rubber Strap package option; the current official listing prices rotating-bezel rubber-strap variants at $805 and rotating-bezel titanium-bracelet-plus-rubber-strap variants at $970
The current official Halios listing specifies Sellita SW200-2 with a 65-hour power reserve
This record represents the 41mm rotating-bezel configuration; fixed-bezel Seaforth IV variants use a different diameter

FAQ

Is the Seaforth IV automatic or quartz?

The Seaforth IV is automatic. The Sellita SW200-2 POWER+ winds itself from the motion of your wrist, so it needs no battery. A full wind holds roughly 65 hours, so it keeps running overnight off the wrist; left longer it stops and restarts once you wear or hand-wind it.

What movement does the Seaforth IV use?

The Seaforth IV is powered by the Sellita SW200-2 POWER+ from Sellita, an automatic caliber with 26 jewels, a 65-hour power reserve, and a 28,800 bph beat rate. Being automatic, it winds from the motion of your wrist and needs no battery.

How water resistant is the Seaforth IV?

The Seaforth IV is rated to 200 m. That is true dive territory: fine for swimming, snorkelling and recreational scuba diving, as well as all daily wear. Whatever the rating, avoid operating the crown or pushers underwater, and have the gaskets checked periodically to keep it reliable.

How big does the Seaforth IV wear?

At 41 mm across with a 46.5 mm lug-to-lug and 12.4 mm thick, the Seaforth IV wears as a modern medium-to-large watch. Lug-to-lug is the measurement that really decides fit, since it sets how far the case spans the wrist — 46.5 mm suits most wrists, and smaller wrists especially should check that figure.

How does the Seaforth IV differ from earlier Seaforth generations?

Compared with earlier Seaforth generations, the current official Seaforth IV GS listing presents a no-date titanium model with fixed-bezel or rotating-bezel configurations, a titanium bracelet with stainless steel clasp, and Globolight XP dial markers with Super-LumiNova C3 X1 (blue).

Is the Seaforth IV still available in stainless steel?

The current official Halios Seaforth IV GS listing only shows titanium case variants; it does not show stainless-steel Seaforth IV variants.

Why does the Seaforth IV use 120 bezel clicks instead of the usual 60?

Halios lists the rotating bezel as unidirectional with 120 stops. The 120-click count provides finer click increments than a 60-click bezel, though tactile preference is subjective.

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