Side by side

Oak & Oscar The Humboldt ExP-02vsZelos Comet 39

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
Comet 39
ZelosComet 39
MSRP $2,499

At a glance

15 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Comet 3939mm
Power Reserve
The Humboldt ExP-0256h
Comet 3940h
Water Resistance
The Humboldt ExP-02200m
Comet 3950m
MSRP
The Humboldt ExP-02$2,400
Comet 39$2,499

Full specifications

Case

6 specs
Category
Tool
Dress
Diameter
39.5mm
39mm
Thickness
12.4mm
7.6mm
Lug-to-Lug
46.8mm
39mm
Water Resistance
200m
50m
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Double-domed
Flat
Dial Color
Grey
Tantalum LE
Lume
Super-LumiNova BGW9
None

Movement

4 specs
Caliber
Sellita SW300
ETA/Peseux 7001
Type
Automatic
Manual
Power Reserve
56h
40h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$2,499

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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.

Zelos Comet 39

Owners widely praise the Zelos Comet 39 for its wearable 39mm size, thin profile under 10mm thanks to its manual-wind Sellita SW215 movement, and its captivating dial with a deep starburst effect. The winding action is described as a joy, and the watch is considered a stunner for its price, blending modern and vintage aesthetics. Some owners note frustration with Zelos's limited production runs leading to quick sell-outs. One owner found the logo childlike, while another experienced strap-rubbing issues with the short lugs, which were resolved with a Milanese bracelet. Overall, owners and reviewers rate the Zelos Comet 39 highly for its excellent value and striking dial design.

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