Side by side

Hamilton Khaki Aviation Day Date AutovsFormex Reef 42 mm

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.

Formex Reef 42 mm

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

At a glance

9 of 29 specs differ
Diameter
Khaki Aviation Day Date Auto42mm
Reef 42 mm42mm
Power Reserve
Khaki Aviation Day Date Auto80h
Reef 42 mm56h
Water Resistance
Khaki Aviation Day Date Auto100m
Reef 42 mm300m
MSRP
Khaki Aviation Day Date Auto$1,125
Reef 42 mm$2,414

Full specifications

Case

5 specs
Category
Pilot
Diver
Thickness
12.15mm
11.4mm
Lug-to-Lug
0mm
47mm
Lug Width
20mm
22mm
Water Resistance
100m
300m

Crystal & Dial

1 specs
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
H-40 (ETA 2834-2 base)
Sellita SW300-1
Power Reserve
80h
56h

Pricing

1 specs
MSRP
$1,125
$2,414
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