Side by side

Oak & Oscar The Humboldt ExP-02vsFortis Marinemaster M-40

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
Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520

At a glance

16 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Marinemaster M-4040mm
Power Reserve
The Humboldt ExP-0256h
Marinemaster M-4038h
Water Resistance
The Humboldt ExP-02200m
Marinemaster M-40300m
MSRP
The Humboldt ExP-02$2,400
Marinemaster M-40$3,520

Full specifications

Case

8 specs
Category
Tool
Diver
Diameter
39.5mm
40mm
Thickness
12.4mm
13mm
Lug-to-Lug
46.8mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
300m
Caseback
Display
Solid

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW300
Sellita SW220-1
Power Reserve
56h
38h
Jewels
25
26
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$3,520

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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.

Fortis Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

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