Side by side

Hamilton Khaki Aviation Takeoff Auto ChronovsSeiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition

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

At a glance

13 of 29 specs differ
Diameter
Khaki Aviation Takeoff Auto Chrono46mm
Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition42.5mm
Power Reserve
Khaki Aviation Takeoff Auto Chrono60h
Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition45h
Water Resistance
Khaki Aviation Takeoff Auto Chrono50m
Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition100m
MSRP
Khaki Aviation Takeoff Auto Chrono$3,575
Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition$3,000

Full specifications

Case

6 specs
Category
Pilot
Chronograph
Diameter
46mm
42.5mm
Thickness
16.2mm
15.1mm
Lug-to-Lug
46mm
50mm
Lug Width
22mm
20mm
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
H-31
8R46
Power Reserve
60h
45h
Jewels
25
34

Pricing

1 specs
MSRP
$3,575
$3,000

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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 Takeoff Auto Chrono

The Hamilton Khaki Aviation Takeoff Auto Chrono is noted for its unique bullhead chronograph design and detachable functionality for desktop display, with a PVD case and yellow accents. Owners praise its solid construction, precise indices, and smooth bezel action, alongside a detailed champagne dial, crisp printing, and retro hands with good lume. However, its extreme thickness and 46.3mm width are flagged as compromising daily wearability, and some find the sizable crown guards hinder usability, while a rattling bracelet with a difficult-to-remove design is also mentioned. The watch uses the Hamilton H-31 automatic chronograph movement with a 60-hour power reserve and is a limited edition of 1999 units. On balance, owners and reviewers appreciate the Hamilton Khaki Aviation Takeoff Auto Chrono for its distinctive design and pilot-inspired legibility, despite practical concerns regarding its size and wearability.

Seiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition

The Seiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition is praised for its well-executed heritage inspiration, clean dial, and balanced design, with its in-house caliber 8R48 noted as a solid movement. Owners appreciate the Zaratsu polishing and the column wheel and vertical clutch on the 8R48 movement, considering it good value. Some find the date wheel deep-set and the bracelet lacking micro-adjustments. The 42.5mm x 15.1mm case size may be large for some wrists. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition highly for its heritage design and solid in-house movement.

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