Hamilton Khaki Aviation Day Date AutovsLongines HYDROCONQUEST GMT

The measurements

Sized up.

Catalogue photos are all shot at the same flattering size. These aren't: every case below shares one millimetre scale.

Hamilton Khaki Aviation Day Date Auto at true scale

Khaki Aviation Day Date Auto

Longines HYDROCONQUEST GMT at true scale

HYDROCONQUEST GMT

Diameter

42mm

43mm

Lug-to-Lug

n/a

52mm

Thickness

12.2mm

lowest

12.9mm

Water Resistance

100m

300m

highest

Power Reserve

80h

highest

72h

MSRP

$1,125

lowest

$3,350

Movement

Hamilton H-40

L844.5

Case

6 specs
Category
Pilot
Diver
Diameter
42mm
43mm
Thickness
12.15mm
12.9mm
Lug-to-Lug
n/a
52mm
Lug Width
20mm
22mm
Water Resistance
100m
300m

Crystal & Dial

1 specs
Dial Color
Black
Green

Movement

2 specs
Caliber
Hamilton H-40
L844.5
Power Reserve
80h
72h

Pricing

1 specs
MSRP
$1,125
$3,350

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 Day Date Auto

Owners and reviewers widely praise the Hamilton Khaki Aviation Day Date Auto for its handsome, legible dial with raised indices and day/date complications, and its versatile, modern pilot watch design. The fully brushed case and good lume are noted strengths, with one owner finding it wears comfortably on a NATO strap. The H-10 caliber offers an 80-hour power reserve, though its decoration and regulation are less refined. Some find the 42mm size large and the skeletonized hour hand tip visually unappealing, while others note the AR coating is decent but not exceptional. Overall, owners and reviewers rate the Hamilton Khaki Aviation Day Date Auto highly for its practical design and value at its price point.

Longines HYDROCONQUEST GMT

The Longines HYDROCONQUEST GMT is widely praised for its excellent finishing, with some comparing it favorably to higher-end dive watches, and its attractive blue sunburst dial. Owners note its practical true GMT complication and robust 41mm brushed case with ceramic bezel, powered by a movement offering a 72-hour power reserve. Some in the community find the round markers at 6 and 9 disrupt dial symmetry, though others appreciate this design element. A common criticism is the difficulty in reading the tiny GMT text beneath the hour markers, and the absence of a quick date adjust feature. One owner reported a sharp feeling on the bracelet's clasp, and another flagged mismatched date wheel colors on certain dial variants. Overall, owners and reviewers consider the Longines HYDROCONQUEST GMT a strong value proposition for a traveler's dive watch, citing its build quality and GMT functionality as key strengths.

From video reviewers

The exclusive traveler's GMT movement is a significant strength. Reviewers noted the value proposition rivals higher-priced competitors. Areas for improvement were mentioned but not detailed.

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