Side by side

Hamilton Khaki Aviation Pilot Day-Date - Air Zermatt AutovsLongines HYDROCONQUEST GMT

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

HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

10 of 29 specs differ
Diameter
Khaki Aviation Pilot Day-Date - Air Zermatt Auto42mm
HYDROCONQUEST GMT41mm
Power Reserve
Khaki Aviation Pilot Day-Date - Air Zermatt Auto80h
HYDROCONQUEST GMT40h
Water Resistance
Khaki Aviation Pilot Day-Date - Air Zermatt Auto100m
HYDROCONQUEST GMT300m
MSRP
Khaki Aviation Pilot Day-Date - Air Zermatt Auto$1,075
HYDROCONQUEST GMT$3,350

Full specifications

Case

6 specs
Category
Pilot
Diver
Diameter
42mm
41mm
Thickness
12.15mm
12.9mm
Lug-to-Lug
46mm
49.4mm
Lug Width
20mm
21mm
Water Resistance
100m
300m

Crystal & Dial

1 specs
Dial Color
Black
Green

Movement

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

Pricing

1 specs
MSRP
$1,075
$3,350

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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 Day-Date - Air Zermatt Auto

The Hamilton Khaki Aviation Pilot Day-Date - Air Zermatt Auto is widely praised for its value, with reviewers noting the Swatch Group's economies of scale contribute to its affordability. Owners and reviewers highlight the large, easy-to-read dial, with one source specifically mentioning the "ice-cold" blue degradé sub-dials as an unusual chromatic anomaly for its price point, and another noting the painted, luminous indices as a significant advantage. The 42mm case is described as offering a nice mix of brushed and polished finishes, and the slightly domed sapphire crystal enhances readability. The H-21 caliber provides a 60-hour power reserve and an anti-magnetic silicon balance spring, while the ETA 2834-2 movement offers precise day/date changes, though one source notes its 40-hour power reserve requires weekly winding. Some criticism is directed at the use of three different fonts and inconsistent color matching for the day/date indicators.

Longines HYDROCONQUEST GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, smooth winding action, and overall value, with some finding its build quality and colorways superior to higher-priced competitors. Reviewers and owners alike note its robustness as a traveler's dive watch with a true GMT movement. Some owners find the round markers at 6 and 9 disrupt dial symmetry, and the GMT hour markers are described as tiny and difficult to read. The date wheel can be mismatched on certain dial colors, and the bracelet clasp is noted as sharp by one reviewer. While some owners wish for a smaller case size, others find the 41mm comfortable. The bezel action is flagged as having bounce-back by one owner, though the brushed finish effectively hides wear. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its robust build and excellent value proposition.

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