Side by side

Oak & Oscar The Humboldt ExP-02vsSugess Seestern S430 Titanium Diver

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
Seestern S430 Titanium Diver
SugessSeestern S430 Titanium Diver
MSRP $299

At a glance

14 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Seestern S430 Titanium Diver40mm
Power Reserve
The Humboldt ExP-0256h
Seestern S430 Titanium Diver40h
Water Resistance
The Humboldt ExP-02200m
Seestern S430 Titanium Diver200m
MSRP
The Humboldt ExP-02$2,400
Seestern S430 Titanium Diver$299

Full specifications

Case

6 specs
Category
Tool
Diver
Diameter
39.5mm
40mm
Thickness
12.4mm
12.5mm
Lug-to-Lug
46.8mm
46mm
Material
316L Stainless Steel
Titanium
Caseback
Display
Solid

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Flat
Dial Color
Grey
Blue
Lume
Super-LumiNova BGW9
Tritium

Movement

4 specs
Caliber
Sellita SW300
Seiko NH35
Beat Rate
28,800 vph
3 vph
Power Reserve
56h
40h
Complications
GMT, Chronograph
GMT, Chronograph, Moonphase, Date

Pricing

1 specs
MSRP
$2,400
$299

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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.

Sugess Seestern S430 Titanium Diver

Owners widely praise the Sugess Seestern S430 Titanium Diver for its genuine titanium construction, making it extremely light and comfortable at 92 grams on a 6.7-inch wrist. The ceramic bezel is described as fantastic and mesmerizing to use, and the brushed finishing is noted as nice. The watch features an NH38 movement, which is appreciated for its lack of ghost date functionality. However, some owners find the price comparable to competitors and have noted issues with the clasp's fit, with some finding the existing holes insufficient and the rotating arm needing to bend. The crown unscrewing is not smooth, and the bezel action is described as gritty with uneven resistance. One owner reported a crown tube failure on a V1 model. Overall, owners rate the Sugess Seestern S430 Titanium Diver highly for its lightweight titanium build and excellent ceramic bezel, despite some concerns regarding the clasp design.

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