The Seaforth IV is the titanium 200 m diver from Halios, made in two widths on one 46.5 mm lug to lug, and it is the Halios model people search for by name. It asks for one decision, a fixed bezel at $765 or a rotating one at $805, and then a wait, because the December/January batch has closed and the next one has no date.
Checked 19 September 2026 · list prices on the maker's site that day unless marked street
Halios, the Vancouver brand Jason Lim founded in 2009, is on its fourth Seaforth, and this one is made in titanium only. Steel and bronze Seaforths have left the catalogue and now turn up only on the secondary market. Earlier batches ran a Sellita SW200-1 and the first Seaforth a Miyota 90S5; the IV takes the SW200-2, no date, with a stated 65-hour reserve, under a double-domed sapphire with AR coating.
There are two cases. The fixed-bezel watch is 40 mm across and the rotating-bezel watch 41 mm, and both are 46.5 mm lug to lug and 12.4 mm thick on a 20 mm lug. Beyond the bezel itself, that 1 mm of diameter is the whole difference on the spec sheet. The 200 m rating, the movement, the Globolight markers and the six dials are shared.
Halios sells by batch from its own site. Pre-orders open on the product page, close when the run is allocated, and the page then shows every variant as sold out. On 19 September 2026 the December/January batch had closed, with delivery estimated at late December 2026 or early January 2027, and nothing could be ordered; the prices here are the list prices for that batch. The storefront read the same again in early October.
Standing claims on this page, and where they come from.
The Seaforth is the Halios model people search for. In Google Search Console for 2 to 29 September 2026 the Seaforth was the only Halios model to appear in more than one query, and the Seaforth queries took 2 of the page's 3 clicks on 22 impressions, against 1 click on 145 impressions for the brand name alone. Search Console, smallseconds.io, 1 October 2026
Each case comes two ways. On rubber the fixed bezel is $765 and the rotating bezel $805; with the titanium bracelet, which has a steel clasp and comes with the rubber strap as well, they are $930 and $970. The rotating bezel is offered with an elapsed-time scale or a 12-hour scale at the same price. All four combinations take the same six dials, in Sunburst Blue, Sunburst Plum, Sunburst Grey, Pastel Blue, Bahama Yellow and O.W.W.W. Pink.
Ø40 mm · automatic · 200 m · $765 · Fixed bezel · rubber or titanium bracelet
Halios Seaforth IV Titanium (fixed bezel)
40 × 46.5 mm · ref 40 × 47
MovementSellita SW200-2 automatic (no-date), 65h power reserve per brand
Case40 mm
Lug to lug46.5 mm
Thickness12.4 mm
Lug width20 mm
Water resistance200 m
Crystalsapphire, double-domed, AR coated
Bezelfixed
LumeGlobolight XP dial markers; Super-LumiNova C3 X1 (blue)
Case materialtitanium
Price$765
Order the fixed bezel if the Seaforth is a daily watch and you would never time anything with the other one. At $765 on rubber it is the cheapest titanium diver with a Swiss movement in the comparison below, and the 40 mm case on 46.5 mm lug to lug is the more compact of the pair. The alternative for $36 less is the Vaer D5, steel, 39 mm, on a Miyota 9015. The trade is a bezel that is a fixed ring and does nothing else.
Ø41 mm · automatic · 200 m · $805 · Rotating bezel · elapsed or 12-hour
Halios Seaforth IV Titanium (rotating bezel, elapsed-time or 12-hour)
41 × 46.5 mm · ref 40 × 47
MovementSellita SW200-2 automatic (no-date), 65h power reserve per brand
Case41 mm
Lug to lug46.5 mm
Thickness12.4 mm
Lug width20 mm
Water resistance200 m
Crystalsapphire, double-domed, AR coated
Bezelunidirectional 120-click rotating, sapphire insert with luminous markings; elapsed-time or 12-hour scale
LumeGlobolight XP dial markers; Super-LumiNova C3 X1 (blue)
Case materialtitanium
Price$805
The Seaforth for anyone who will turn the bezel, at $805 on rubber or $970 on the bracelet. Pick the elapsed-time scale for timing and the 12-hour scale for a second time zone, which it gives you by hand without a GMT movement. The 41 mm case keeps the same 46.5 mm lug to lug as the fixed watch, so the extra 1 mm of width adds no length. The alternative at €730 is Baltic's Aquascaphe Titanium, rated to 300 m on a Miyota 9039. The trade is $40 for a 120-click bezel with a luminous sapphire insert.
Two divers sit either side of the Seaforth IV on price. The Vaer D5 at $729 is steel, 39 mm, 46 mm lug to lug and 11.9 mm thick on a Miyota 9015, assembled in the USA, and it is the thinner and cheaper watch. Baltic's Aquascaphe Titanium at €730 is the other titanium diver in the band, 41 mm and 47 mm lug to lug, rated to 300 m and 0.9 mm thicker than the Seaforth at 13.3 mm, on a Miyota 9039. The Halios is the only one of the three with a Swiss movement. The step up is Serica's 5303 diving chronometer at $1,850, 39 mm on the same 46.5 mm lug to lug, 300 m, on a COSC-certified Soprod.
Who it is for
The Seaforth IV is for the buyer who wants titanium and a Swiss automatic under $1,000, has no use for a date, and is content to order months before the watch arrives. Its 46.5 mm lug to lug suits the wrists that already take a 40 mm diver. Look elsewhere if you want steel, which the IV is not made in, or a date, which no Halios has, or a watch before the new year, in which case the Vaer D5 and the Aquascaphe Titanium are the two to compare.
Questions people ask
Is the Halios Seaforth IV titanium?
Yes, and only titanium. The Seaforth IV product page lists no other case material, and steel and bronze Seaforths from earlier generations appear only on the secondary market. The bracelet is titanium with a steel clasp, and it comes with the rubber strap as well.
Seaforth IV fixed bezel or rotating bezel?
The difference is the bezel, 1 mm and $40. The fixed-bezel watch is 40 mm at $765 on rubber. The rotating one is 41 mm at $805, with a 120-click unidirectional bezel and a sapphire insert in an elapsed-time or 12-hour scale. Lug to lug (46.5 mm), thickness (12.4 mm), movement and the 200 m rating are shared.
When can you buy a Halios Seaforth IV?
When Halios opens the next batch on its own site. On 19 September 2026 pre-orders for the December/January batch had closed, with delivery estimated at late December 2026 or early January 2027, and the brand had given no date for the run after it.
Is there a Halios Seaforth GMT?
Not in the current range. The Seaforth IV comes with a fixed bezel or a rotating one in an elapsed-time or 12-hour scale, and neither the storefront nor the brand's Upcoming page lists a GMT. The 12-hour bezel is the nearest thing, a second time zone set by hand.
What movement is in the Seaforth IV?
The Sellita SW200-2, automatic, with no date and a stated 65-hour power reserve. Earlier Seaforth batches used the Sellita SW200-1, and the first generation used a Miyota 90S5.
