Side by side

Oak & Oscar The Humboldt ExP-02vsHamilton Khaki Field King Day-Date

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

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.

Hamilton Khaki Field King Day-Date

Hamilton Khaki Field King Day-Date owners widely praise its classic styling, 80-hour power reserve, and excellent value. Opinions on water resistance are split; some express concern over the 50m rating, while others find it sufficient for daily wear and swimming. One owner notes the stock strap can be stiff. Service costs range from $55 for routine maintenance to $220 for full service with movement replacement. On balance, owners rate the Hamilton Khaki Field King Day-Date highly for its classic aesthetics and impressive power reserve at its price point.

From video reviewers

The 80-hour power reserve from the H-40 automatic movement is a significant strength. The 50-meter water resistance is considered a limitation for a field watch.

At a glance

15 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Khaki Field King Day-Date40mm
Power Reserve
The Humboldt ExP-0256h
Khaki Field King Day-Date80h
Water Resistance
The Humboldt ExP-02200m
Khaki Field King Day-Date100m
MSRP
The Humboldt ExP-02$2,400
Khaki Field King Day-Date$845

Full specifications

Case

7 specs
Category
Tool
Field
Diameter
39.5mm
40mm
Thickness
12.4mm
11.8mm
Lug-to-Lug
46.8mm
50mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
100m
Caseback
Display

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Dial Color
Grey
Black
Indices
Applied
Lume
Super-LumiNova BGW9
None

Movement

3 specs
Caliber
Sellita SW300-1
Hamilton H-40
Power Reserve
56h
80h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$845
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