Side by side

Hamilton Khaki Aviation Pilot Pioneer Mechanical ChronovsOak & Oscar The Humboldt GMT

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

The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175

At a glance

18 of 29 specs differ
Diameter
Khaki Aviation Pilot Pioneer Mechanical Chrono40mm
The Humboldt GMT39.5mm
Power Reserve
Khaki Aviation Pilot Pioneer Mechanical Chrono60h
The Humboldt GMT56 hoursh
Water Resistance
Khaki Aviation Pilot Pioneer Mechanical Chrono100m
The Humboldt GMT200m
MSRP
Khaki Aviation Pilot Pioneer Mechanical Chrono$2,445
The Humboldt GMT$2,175

Full specifications

Case

9 specs
Category
Pilot
GMT
Diameter
40mm
39.5mm
Thickness
14.35mm
12.5mm
Lug-to-Lug
50mm
46.8mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed
Water Resistance
100m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

4 specs
Crystal Shape
Flat
Double-domed
AR Coating
Inner
Underside
Dial Color
Blue
White
Lume
None
Super-LumiNova

Movement

4 specs
Caliber
H-51-Si
Sellita SW330
Type
Manual
Automatic
Beat Rate
28,800 vph
4 vph
Power Reserve
60h
56 hoursh

Pricing

1 specs
MSRP
$2,445
$2,175

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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.

Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono

Owners and reviewers widely praise the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono for its authentic military design, attractive dial execution, and intriguing asymmetrical case, with many appreciating its utilitarian feel and vintage vibe. The hand-wound H-51-Si movement, offering a 60-hour power reserve and accuracy around +5 to +7 seconds per day, is also noted positively, as is the satisfying feel of manual winding. Some owners find the 36mm case size light and versatile, while others note it wears larger than its dimensions suggest. However, several sources point to the mineral crystal as a drawback compared to sapphire, and the lume is generally described as weak. The included strap is frequently criticized for being too long and uncomfortable, with many preferring it on a NATO strap. On balance, owners and reviewers rate the Hamilton Khaki Aviation Pilot Pioneer Mechanical Chrono highly for its compelling vintage military aesthetic and solid value proposition.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

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