Side by side

Halios Seaforth IVvsTudor Pelagos FXD Chrono

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
Pelagos FXD Chrono
TudorPelagos FXD Chrono
MSRP $6,375

At a glance

14 of 29 specs differ
Diameter
Seaforth IV40mm
Pelagos FXD Chrono43mm
Power Reserve
Seaforth IV40h
Pelagos FXD Chrono70h
Water Resistance
Seaforth IV200m
Pelagos FXD Chrono100m
MSRP
Seaforth IV$765
Pelagos FXD Chrono$6,375

Full specifications

Case

8 specs
Category
Diver
Chronograph
Diameter
40mm
43mm
Thickness
12.4mm
13.2mm
Lug-to-Lug
46.5mm
46mm
Lug Width
20mm
22mm
Material
Titanium
43mm black carbon composite case with matt finish · Lugs: 22mm lug width · Case thickness: 13.2mm
Water Resistance
200m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

2 specs
Crystal
Sapphire (double-domed)
Sapphire
Dial Color
Blue
Black

Movement

3 specs
Caliber
Sellita SW200-2
MT5813
Power Reserve
40h
70h
Complications
None
Chronograph

Pricing

1 specs
MSRP
$765
$6,375

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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.

Tudor Pelagos FXD Chrono

The Tudor Pelagos FXD Chrono is widely praised for its lightweight construction, with owners highlighting its carbon composite case and titanium case back contributing to exceptional comfort and wearability, even on smaller wrists. Reviewers and owners alike commend its excellent legibility, robust build quality, and impressive bezel action, with a smooth winding feel noted by one owner. The COSC-certified MT5813 movement provides a 70-hour power reserve. However, some find the tachymeter scale difficult to read, and the 45-minute counter impractical for cycling. One owner reported poor timekeeping with a deviation of -3 to -3.5 seconds per day, while another saw accuracy within a couple of seconds per day, and a separate owner noted three services in under two years. The included straps are frequently criticized as less appealing or having short length, and some question the watch's overall utility for cyclists compared to dedicated head units.

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