Side by side

Oak & Oscar The Humboldt ExP-02vsHalios Seaforth IV

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

The Humboldt ExP-02
Oak & OscarThe Humboldt ExP-02
MSRP $2,400
Seaforth IV
HaliosSeaforth IV
MSRP $765

At a glance

13 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Seaforth IV40mm
Power Reserve
The Humboldt ExP-0256h
Seaforth IV40h
Water Resistance
The Humboldt ExP-02200m
Seaforth IV200m
MSRP
The Humboldt ExP-02$2,400
Seaforth IV$765

Full specifications

Case

5 specs
Category
Tool
Diver
Diameter
39.5mm
40mm
Lug-to-Lug
46.8mm
46.5mm
Material
316L Stainless Steel
Titanium
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal
Sapphire
Sapphire (double-domed)
Crystal Shape
Double-domed
Flat
Dial Color
Grey
Blue
Lume
Super-LumiNova BGW9
None

Movement

3 specs
Caliber
Sellita SW300
Sellita SW200-2
Power Reserve
56h
40h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$765

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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.

Oak & Oscar The Humboldt ExP-02

Oak & Oscar The Humboldt ExP-02 is a 39.5mm stainless steel tool watch featuring a unique, layered aluminum "ghost dial" for legibility and 200m water resistance, powered by a Sellita SW300 movement. Its appeal is limited by a US$2,550 price and an extremely limited production of 20 pieces, with its experimental dial construction done in Chicago. Overall, reviewers highlight the endearing dial and in-house bezel production as key features of the Oak & Oscar Humboldt ExP-02.

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.

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