Side by side

Oak & Oscar The Humboldt ExP-02vsLongines HYDROCONQUEST

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

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.

Longines HYDROCONQUEST

Owners widely praise the Longines HydroConquest's dial and finishing, with one owner finding it superior to a Rolex Submariner. The movement is noted as well-regulated, losing about 2 seconds per day. The watch is considered a versatile everyday or business-casual option, offering good value. However, owners criticize the bracelet for lacking tool-less micro-adjustment and describe winding the crown as a nuisance. Some in the line report tiny GMT markers that are difficult to read and the absence of a quick date adjust feature. Overall, owners rate the Longines HydroConquest highly for its finishing and value.

At a glance

15 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
HYDROCONQUEST39mm
Power Reserve
The Humboldt ExP-0256h
HYDROCONQUEST
Water Resistance
The Humboldt ExP-02200m
HYDROCONQUEST300m
MSRP
The Humboldt ExP-02$2,400
HYDROCONQUEST$2,350

Full specifications

Case

8 specs
Category
Tool
Diver
Diameter
39.5mm
39mm
Thickness
12.4mm
12.2mm
Lug-to-Lug
46.8mm
48.1mm
Lug Width
20mm
19mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
300m
Caseback
Display

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Indices
Applied
Lume
Super-LumiNova BGW9
None

Movement

3 specs
Caliber
Sellita SW300-1
Longines L888.5 (ETA A31.L01 base)
Power Reserve
56h
0h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$2,350
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