Side by side

Hamilton Khaki Aviation X-Wind GMT Chrono QuartzvsFormex Reef GMT

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

Reef GMT
FormexReef GMT
MSRP $2,235

At a glance

10 of 29 specs differ
Diameter
Khaki Aviation X-Wind GMT Chrono Quartz46mm
Reef GMT42mm
Power Reserve
Khaki Aviation X-Wind GMT Chrono Quartz40h
Reef GMT56h
Water Resistance
Khaki Aviation X-Wind GMT Chrono Quartz100m
Reef GMT300m
MSRP
Khaki Aviation X-Wind GMT Chrono Quartz$1,245
Reef GMT$2,235

Full specifications

Case

5 specs
Category
Pilot
GMT
Diameter
46mm
42mm
Thickness
13.75mm
11.4mm
Lug-to-Lug
46mm
47mm
Water Resistance
100m
300m

Crystal & Dial

1 specs
Lume
None
Super-LumiNova

Movement

3 specs
Caliber
G10.962
Sellita SW330-2
Type
Quartz
Automatic
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$1,245
$2,235

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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 X-Wind GMT Chrono Quartz

Owners praise the Hamilton Khaki Aviation X-Wind GMT Chrono Quartz for its sturdy build, 100-meter water resistance, and screw-down crown, with one owner noting outstanding fit, finish, and quality. The dial design is described as meticulous, featuring raised, brushed stainless steel indices and a downward-pointing triangle. However, some owners find the watch big and chunky, and its specific GMT and chronograph features are considered by some to be of limited practical use. Lume is described as good but not amazing, and the AR coating on the sapphire crystal is decent. Accuracy figures vary, with one owner reporting the watch gained 6 seconds in its first few days of wear. Overall, owners rate the Hamilton Khaki Aviation X-Wind GMT Chrono Quartz as a dependable and well-built travel watch, particularly for its robust construction and detailed dial design.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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