Side by side

Oak & Oscar The Humboldt ExP-02vsSeiko Prospex Sea 1965 Heritage Diver's Watch

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

At a glance

16 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Prospex Sea 1965 Heritage Diver's Watch40mm
Power Reserve
The Humboldt ExP-0256h
Prospex Sea 1965 Heritage Diver's Watch72h
Water Resistance
The Humboldt ExP-02200m
Prospex Sea 1965 Heritage Diver's Watch300m
MSRP
The Humboldt ExP-02$2,400
Prospex Sea 1965 Heritage Diver's Watch$1,300

Full specifications

Case

7 specs
Category
Tool
Diver
Diameter
39.5mm
40mm
Thickness
12.4mm
13mm
Lug-to-Lug
46.8mm
46.4mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
300m
Caseback
Display
Solid

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW300
6R55
Power Reserve
56h
72h
Jewels
25
24
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$1,300

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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 1965 Heritage Diver's Watch

The Seiko Prospex Sea 1965 Heritage Diver's Watch is praised for its refined engineering and updated features, including a 300m water resistance and a 72-hour power reserve from the Caliber 6R55 movement in a 40mm case. Owners note its better build quality and interesting finishing with a mix of polished and brushed surfaces. The "Tranquil Teal" variant features a jewel-toned dial with a rippling-water pattern. However, some owners consider the price too high, and concerns exist regarding the accuracy of the 6R movements, with some reporting theirs run slow. One review notes a reflective dial that impacts legibility. On balance, owners and reviewers appreciate the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined design and improved specifications over previous generations, despite some reservations about movement accuracy and price.

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