Side by side

Hamilton Khaki Aviation X-Wind Day Date AutovsLongines LONGINES SPIRIT FLYBACK PROTOTYPE

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

Khaki Aviation X-Wind Day Date Auto
HamiltonKhaki Aviation X-Wind Day Date Auto
MSRP $1,375
LONGINES SPIRIT FLYBACK PROTOTYPE
LonginesLONGINES SPIRIT FLYBACK PROTOTYPE
MSRP $7,400

At a glance

7 of 29 specs differ
Diameter
Khaki Aviation X-Wind Day Date Auto45mm
LONGINES SPIRIT FLYBACK PROTOTYPE42mm
Power Reserve
Khaki Aviation X-Wind Day Date Auto80h
LONGINES SPIRIT FLYBACK PROTOTYPE40h
Water Resistance
Khaki Aviation X-Wind Day Date Auto100m
LONGINES SPIRIT FLYBACK PROTOTYPE100m
MSRP
Khaki Aviation X-Wind Day Date Auto$1,375
LONGINES SPIRIT FLYBACK PROTOTYPE$7,400

Full specifications

Case

4 specs
Category
Pilot
Chronograph
Diameter
45mm
42mm
Thickness
12.8mm
17mm
Lug-to-Lug
46mm
49.5mm

Movement

2 specs
Caliber
H-30
L791.4
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$1,375
$7,400

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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 Day Date Auto

Owners widely praise the Hamilton Khaki Aviation X-Wind Day Date Auto for its value, technical aesthetic, and versatile wearability with straps. Reviewers and owners alike highlight its excellent legibility, bold Arabic numerals, and the appeal of its pilot watch design, with many appreciating the 80-hour power reserve. Some owners find the crosswind calculation functions unnecessary, and there are mixed views on the dial's font usage and color matching. Lume is frequently noted as weak, and some find the size large or the left-handed crown and pusher setup uncomfortable. Accuracy figures range from gaining 6 seconds in a few days to approximately -6 seconds per day. Overall, owners rate the Hamilton Khaki Aviation X-Wind Day Date Auto highly for its impressive value and functional pilot watch design.

LONGINES SPIRIT FLYBACK PROTOTYPE

Owners widely praise the Longines Spirit Flyback Prototype for its attractive finishing, COSC-certified movement, and value as a flyback chronograph. Reviewers highlight its refined 39.5mm case and simplified dial, while some owners appreciate the reduced thickness and improved wearability compared to larger variants, with a lug-to-lug distance noted as potentially long for smaller wrists. The watch features a 68-hour power reserve and a bespoke L791.4 movement. However, the case thickness is a consistent point of discussion, with multiple sources citing 17mm, though some reviewers suggest thoughtful design makes it wear closer to 13.5-14mm. Owners are split on the dial's aesthetic, with some preferring previous configurations with gold subdial rings and concentric textures over the current flat matte dial and cut-off numbers. The leather strap is also noted as stiff and pinching.

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