Side by side

Oak & Oscar The Humboldt ExP-02vsJack Mason Strat-o-timer GMT

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.

Jack Mason Strat-o-timer GMT

Owners and reviewers widely praise the Jack Mason Strat-o-timer GMT for its exceptional value and traveler GMT functionality powered by the Miyota 9075 movement. Specific strengths highlighted include impressive fit and finish, screw-in bracelet pins, on-the-fly adjustment, sapphire crystal front and back, a screw-down crown, and a lumed bezel. The 7-link bracelet, with its micro-adjust buckle offering 9 points of adjustment, is frequently cited as a standout feature, with some owners comparing it favorably to much more expensive watches. Some reviewers note "chubby" hour markers and a potentially plastic bezel insert, though others state it is sapphire. The watch is praised for its comfortable 42mm case and vintage aesthetic. Overall, owners rate the Jack Mason Strat-o-timer GMT highly for its outstanding value and well-executed traveler GMT complication.

From video reviewers

The Miyota 9075 true GMT movement is a consensus strength. The lume on the hands, dial, and bezel is also a shared positive feature. Reviewers did not reach a consensus on any weaknesses or points of disagreement.

At a glance

14 of 29 specs differ
Diameter
The Humboldt ExP-0239.5mm
Strat-o-timer GMT42mm
Power Reserve
The Humboldt ExP-0256h
Strat-o-timer GMT42h
Water Resistance
The Humboldt ExP-02200m
Strat-o-timer GMT200m
MSRP
The Humboldt ExP-02$2,400
Strat-o-timer GMT$1,149

Full specifications

Case

6 specs
Category
Tool
Diameter
39.5mm
42mm
Thickness
12.4mm
13.2mm
Lug-to-Lug
46.8mm
49mm
Lug Width
20mm
22mm
Caseback
Display

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW300-1
Miyota 9075
Power Reserve
56h
42h
Complications
GMT, Chronograph
None

Pricing

1 specs
MSRP
$2,400
$1,149
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