Side by side

Boldr Expedition EnigmathvsHamilton Khaki Aviation Day Date Auto

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.

Boldr Expedition Enigmath

Boldr is widely praised for its attractive fumé dials, blend of sandblasted and polished case finishes, and excellent legibility. Owners report good build quality and value, with some calling it an excellent GADA or hiking watch, and the Miyota 9039 movement is noted for its smooth seconds hand sweep. However, the practical usefulness of the slide rule bezel is questioned, and some find the designs "microbrand-y" or potentially overpriced, with one owner reporting a negative warranty experience. On balance, owners and reviewers rate Boldr highly for its attractive dials and solid build quality at the price point.

From video reviewers

The watch's slide rule function is a convenient feature, allowing for calculations on the go. One potential drawback is the use of the Japanese Miyota 9039 movement, which may be a trade-off for some buyers. Reviewers disagree on whether the quick 'on the fly' adjust bracelet is a more significant advantage than the watch's sapphire crystal for durability and scratch resistance.

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.

At a glance

11 of 29 specs differ
Diameter
Expedition Enigmath41mm
Khaki Aviation Day Date Auto42mm
Power Reserve
Expedition Enigmath42h
Khaki Aviation Day Date Auto80h
Water Resistance
Expedition Enigmath200m
Khaki Aviation Day Date Auto100m
MSRP
Expedition Enigmath$599
Khaki Aviation Day Date Auto$1,125

Full specifications

Case

5 specs
Category
Tool
Pilot
Diameter
41mm
42mm
Thickness
12.8mm
12.15mm
Lug-to-Lug
47.5mm
46mm
Water Resistance
200m
100m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enigmath Coconino
Black
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Miyota 9039
H-40 (ETA 2834-2 base)
Power Reserve
42h
80h

Pricing

1 specs
MSRP
$599
$1,125
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