Side by side

Halios Seaforth IVvsMarathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
JDD (Jumbo Day/Date) Anthracite Diver's Automatic
MarathonJDD (Jumbo Day/Date) Anthracite Diver's Automatic
MSRP $3,250

At a glance

10 of 29 specs differ
Diameter
Seaforth IV40mm
JDD (Jumbo Day/Date) Anthracite Diver's Automatic46mm
Power Reserve
Seaforth IV40h
JDD (Jumbo Day/Date) Anthracite Diver's Automatic40h
Water Resistance
Seaforth IV200m
JDD (Jumbo Day/Date) Anthracite Diver's Automatic300m
MSRP
Seaforth IV$765
JDD (Jumbo Day/Date) Anthracite Diver's Automatic$3,250

Full specifications

Case

6 specs
Diameter
40mm
46mm
Thickness
12.4mm
18mm
Lug-to-Lug
46.5mm
55mm
Lug Width
20mm
22mm
Material
Titanium
316L Stainless Steel (Anthracite IP)
Water Resistance
200m
300m

Crystal & Dial

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

Movement

1 specs
Caliber
Sellita SW200-2
Sellita SW220-1

Pricing

1 specs
MSRP
$765
$3,250

Follow this matchup

Get a note when Halios Seaforth IV vs Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic gets more votes, a community discussion, or a price drop. No account needed.

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.

Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

Owners widely praise the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic as a tough, underrated tool watch with lifestyle appeal, highlighting its robust build and tritium lume for excellent legibility. However, its 46mm size is a common criticism, with some finding it heavy and top-heavy, and the OEM rubber strap stiff. One owner noted the watch runs about 10 seconds fast after three days, and the ETA 2836-2 movement offers approximately two days of power reserve. On balance, owners and reviewers rate the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic highly for its robust tool-watch build and legibility, despite its substantial size.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.