Side by side

Oak & Oscar The Humboldt ExP-02vsSpinnaker Challenger Automatic

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
Challenger Automatic
SpinnakerChallenger Automatic
MSRP $289

At a glance

13 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Challenger Automatic42mm
Power Reserve
The Humboldt ExP-0256h
Challenger Automatic40h
Water Resistance
The Humboldt ExP-02200m
Challenger Automatic200m
MSRP
The Humboldt ExP-02$2,400
Challenger Automatic$289

Full specifications

Case

6 specs
Category
Tool
Diver
Diameter
39.5mm
42mm
Thickness
12.4mm
19mm
Lug-to-Lug
46.8mm
49.5mm
Lug Width
20mm
22mm
Caseback
Display
Solid

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Flat
Dial Color
Grey
Blue
Lume
Super-LumiNova BGW9
None

Movement

3 specs
Caliber
Sellita SW300
SII NH35A
Power Reserve
56h
40h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$289

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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.

Spinnaker Challenger Automatic

The Spinnaker Challenger Automatic is widely praised for its fun, playful design, solid build quality, and satisfying bezel action. Owners appreciate the comfortable 42mm DLC-coated case and the thoughtful integration of the Popeye theme, with the character serving as the hour and minute hands. Reviewers note the reliable Seiko NH35 movement and 300m water resistance. Some owners find the blue lume weaker than expected, and the ultra-domed sapphire crystal presents challenges for photography. The thick rubber strap is also cited as difficult to manage. Overall, owners and reviewers rate the Spinnaker Challenger Automatic highly for its unique character integration and solid dive watch fundamentals at its price point.

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