Side by side

Oak & Oscar The Humboldt ExP-02vsGrand Seiko SLGB003

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
SLGB003
Grand SeikoSLGB003
MSRP $11,400

At a glance

16 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
SLGB00337mm
Power Reserve
The Humboldt ExP-0256h
SLGB00372h
Water Resistance
The Humboldt ExP-02200m
SLGB003100m
MSRP
The Humboldt ExP-02$2,400
SLGB003$11,400

Full specifications

Case

7 specs
Category
Tool
Dress
Diameter
39.5mm
37mm
Thickness
12.4mm
11.4mm
Lug-to-Lug
46.8mm
44.3mm
Material
316L Stainless Steel
Titanium
Water Resistance
200m
100m
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Flat
AR Coating
Inner
Yes
Dial Color
Grey
Black
Lume
Super-LumiNova BGW9
None

Movement

4 specs
Caliber
Sellita SW300
9RB2
Type
Automatic
Spring Drive
Power Reserve
56h
72h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$11,400

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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.

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.

Grand Seiko SLGB003

Grand Seiko SLGB003 owners widely praise its lightness and comfort, with a dial that offers a shifting character in different lighting conditions. Reviewers note its compact case size enhances wearability and versatility across wrist sizes. However, one owner found the dial underwhelming, and another reported a date disc issue with lower numbers not changing correctly. Some question the value proposition at around $10,000, citing the bracelet and dial as potential drawbacks, while others highlight the movement and smaller dimensions as significant positives. On balance, owners rate the Grand Seiko SLGB003 highly for its movement and compact dimensions, despite some reservations about the dial and bracelet.

From video reviewers

The watch's exceptional accuracy is a notable strength, with both reviewers highlighting its precise timekeeping. A weakness is the relatively high price point compared to other Grand Seiko models. Reviewers disagree on the ideal case size, with one reviewer noting it's relatively small at 37mm, while the other doesn't mention case size as a concern.

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