Side by side

AVI-8 Flyboy Airmaster GMT AutomaticvsHamilton Khaki Field Mechanical

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

Flyboy Airmaster GMT Automatic
AVI-8Flyboy Airmaster GMT Automatic
MSRP $365
Khaki Field Mechanical
HamiltonKhaki Field Mechanical
MSRP $725

At a glance

12 of 29 specs differ
Diameter
Flyboy Airmaster GMT Automatic40mm
Khaki Field Mechanical36mm
Power Reserve
Flyboy Airmaster GMT Automatic40h
Khaki Field Mechanical80h
Water Resistance
Flyboy Airmaster GMT Automatic50m
Khaki Field Mechanical100m
MSRP
Flyboy Airmaster GMT Automatic$365
Khaki Field Mechanical$725

Full specifications

Case

7 specs
Category
GMT
Field
Diameter
40mm
36mm
Thickness
10.2mm
Lug-to-Lug
46mm
Lug Width
18mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

1 specs
Crystal
Sapphire
Acrylic

Movement

3 specs
Caliber
NH34
H-50
Type
Automatic
Manual
Power Reserve
40h
80h

Pricing

1 specs
MSRP
$365
$725

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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.

AVI-8 Flyboy Airmaster GMT Automatic

Owners widely praise the AVI-8 Flyboy Airmaster GMT Automatic for its robust build quality, intricate three-timezone function, and crisp dial texture. The watch is noted for its wearable 41mm case size and 48.5mm lug-to-lug, with an internally positioned GMT complication that maintains a clean dial appearance. Some owners report the stock leather strap feels cheap and limits strap changing options. On balance, owners rate the AVI-8 Flyboy Airmaster GMT Automatic highly for its solid finishing and value, particularly highlighting the dial's depth and texture.

Hamilton Khaki Field Mechanical

Owners widely praise the Hamilton Khaki Field Mechanical as an archetype of a field watch, highlighting its thin case, excellent finishing, and smooth winding action, with some calling it the best pure field watch available. The daily winding ritual is considered a charming aspect of ownership, and the branding is noted as tasteful and subtle. One owner specifically appreciates the lugs. A drawback cited is the highly reflective, non-AR-coated crystal, and accuracy ranges from -6 seconds per day to unspecified better performance. Overall, owners rate the Hamilton Khaki Field Mechanical highly for its rugged, all-business aesthetic and value as a quintessential field watch.

From video reviewers

The watch's pure field style design is a significant strength. The lume brightness is a shared weakness. Reviewers disagreed on the power reserve, with one stating 80 hours and another 46 hours.

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