Side by side

Hamilton Khaki Aviation Day Date AutovsSeiko Prospex SPEEDTIMER Mechanical

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

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.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

At a glance

13 of 29 specs differ
Diameter
Khaki Aviation Day Date Auto42mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
Khaki Aviation Day Date Auto80h
Prospex SPEEDTIMER Mechanical72h
Water Resistance
Khaki Aviation Day Date Auto100m
Prospex SPEEDTIMER Mechanical200m
MSRP
Khaki Aviation Day Date Auto$1,125
Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs
Category
Pilot
Chronograph
Diameter
42mm
39.5mm
Thickness
12.15mm
12mm
Lug-to-Lug
0mm
44.5mm
Water Resistance
100m
200m

Crystal & Dial

4 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
H-40 (ETA 2834-2 base)
6R55
Power Reserve
80h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,125
$995
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