Side by side

Boldr Expedition EnigmathvsOak & Oscar The Humboldt ExP-02

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

Expedition Enigmath
BoldrExpedition Enigmath
MSRP $599
The Humboldt ExP-02
Oak & OscarThe Humboldt ExP-02
MSRP $2,400

At a glance

13 of 29 specs differ
Diameter
Expedition Enigmath41mm
The Humboldt ExP-0239.5mm
Power Reserve
Expedition Enigmath42h
The Humboldt ExP-0256h
Water Resistance
Expedition Enigmath200m
The Humboldt ExP-02200m
MSRP
Expedition Enigmath$599
The Humboldt ExP-02$2,400

Full specifications

Case

5 specs
Diameter
41mm
39.5mm
Thickness
12.8mm
12.4mm
Lug-to-Lug
47.5mm
46.8mm
Material
Stainless Steel
316L Stainless Steel
Caseback
Solid
Display

Crystal & Dial

4 specs
Crystal Shape
Flat
Double-domed
AR Coating
Yes
Inner
Dial Color
Enigmath Coconino
Grey
Lume
Super-LumiNova
Super-LumiNova BGW9

Movement

3 specs
Caliber
Miyota 9039,
Sellita SW300
Power Reserve
42h
56h
Complications
None
GMT, Chronograph

Pricing

1 specs
MSRP
$599
$2,400

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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.

Boldr Expedition Enigmath

The watch's slide rule function is a convenient feature, allowing for calculations on the go. One potential drawback is the use of the Japanese Miyota 9039 movement, which may be a trade-off for some buyers. Reviewers disagree on whether the quick 'on the fly' adjust bracelet is a more significant advantage than the watch's sapphire crystal for durability and scratch resistance.

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.

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