Side by side

Oak & Oscar The Humboldt ExP-02vsMaen Skymaster 38 MKIII

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
Skymaster 38 MKIII
MaenSkymaster 38 MKIII
MSRP $1,679

At a glance

15 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Skymaster 38 MKIII38mm
Power Reserve
The Humboldt ExP-0256h
Skymaster 38 MKIII40h
Water Resistance
The Humboldt ExP-02200m
Skymaster 38 MKIII100m
MSRP
The Humboldt ExP-02$2,400
Skymaster 38 MKIII$1,679

Full specifications

Case

7 specs
Category
Tool
Chronograph
Diameter
39.5mm
38mm
Thickness
12.4mm
13.4mm
Lug-to-Lug
46.8mm
Lug Width
20mm
Water Resistance
200m
100m
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Double-domed
Flat
Dial Color
Grey
M6.1.1
Lume
Super-LumiNova BGW9
None

Movement

3 specs
Caliber
Sellita SW300
Sellita SW510mb
Power Reserve
56h
40h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$1,679

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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.

Maen Skymaster 38 MKIII

The Maen Skymaster 38 MKIII is praised for its refined case, impressive fit and finish, and compact 38mm size, which offers a premium feel with a sharp, legible dial and well-executed applied markers. Reviewers note the sweet winding action and the vintage-inspired brown sunburst dial with dauphine hands and lollipop register pointers. The watch is powered by a manual-wind Sellita SW510Mb movement with a 63-hour power reserve. Accuracy figures vary, with one reviewer reporting +7 seconds per day and another stating a tolerance of +/-15 seconds per day. On balance, owners and reviewers appreciate the Maen Skymaster 38 MKIII for its refined vintage-inspired design and compact dimensions at its price point.

From video reviewers

The 38mm case size is a key strength for the Maen Skymaster 38 MKIII. Reviewers noted the excellent quality-price ratio for a Swiss-made chronograph.

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