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

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

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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.

Hamilton Khaki Field King Auto

Owners and reviewers widely praise the Hamilton Khaki Field King Auto for its 80-hour power reserve, hacking capability, and snappy day-date function, with accuracy figures ranging from +1 to +5 seconds per day. The watch is also noted for its legibility, attractive dial options, and 100m water resistance. Some owners find the stock strap stiff and the case finishing lacks fine detail, while others mention the lume is decent but fades significantly after about 30 minutes. The lack of an anti-reflective coating on the sapphire crystal is a recurring point, and the crown does not feel like it fully pushes in for some. On balance, owners and reviewers rate the Hamilton Khaki Field King Auto highly for its robust feature set and value, particularly its day-date complication and extended power reserve.

From video reviewers

The 80-hour power reserve from the H-40 movement is a significant advantage. The lack of AR coating on the sapphire crystal hinders legibility in direct light, and the 50-meter water resistance is limited for a field watch. Reviewers disagreed on the watch case geometry and ergonomics, with one noting it contributed to buyer's remorse and another suggesting it should offer a comfortable fit.

At a glance

15 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Khaki Field King Auto40mm
Power Reserve
The Humboldt ExP-0256h
Khaki Field King Auto80h
Water Resistance
The Humboldt ExP-02200m
Khaki Field King Auto50m
MSRP
The Humboldt ExP-02$2,400
Khaki Field King Auto$845

Full specifications

Case

7 specs
Category
Tool
Field
Diameter
39.5mm
40mm
Thickness
12.4mm
11.15mm
Lug-to-Lug
46.8mm
0mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
50m
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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