Side by side

Oak & Oscar The Humboldt ExP-02vsSeiko Prospex Sea

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
Prospex Sea
SeikoProspex Sea
MSRP $1,500

At a glance

16 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Prospex Sea43.5mm
Power Reserve
The Humboldt ExP-0256h
Prospex Sea70h
Water Resistance
The Humboldt ExP-02200m
Prospex Sea200m
MSRP
The Humboldt ExP-02$2,400
Prospex Sea$1,500

Full specifications

Case

7 specs
Category
Tool
Diver
Diameter
39.5mm
43.5mm
Thickness
12.4mm
13.3mm
Lug-to-Lug
46.8mm
51mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Titanium
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Flat
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Grey
Black
Lume
Super-LumiNova BGW9
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW300
6R35
Power Reserve
56h
70h
Jewels
25
24
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$1,500

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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.

Seiko Prospex Sea

Seiko Prospex Sea owners and reviewers praise its Marinemaster-style aesthetic, excellent case finishing, and impressive LumiBrite lume. The watch is powered by the 6R15 movement with a 50-hour power reserve and comes with both a steel bracelet and a silicone strap. Some owners find the Seiko Prospex Sea to be a great value and a suitable first "proper" watch, while others report it is uncomfortably big, thick, and heavy on smaller wrists. Reviewers note the GMT function is secondary with a less prominent scale, and the bezel's quieter clicks may not appeal to all. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and finishing at its price point.

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