Side by side

Boldr Expedition EnigmathvsHamilton Khaki Field Mechanical Power Reserve

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

Expedition Enigmath
BoldrExpedition Enigmath
MSRP $599
Khaki Field Mechanical Power Reserve
HamiltonKhaki Field Mechanical Power Reserve
MSRP $1,025

At a glance

12 of 29 specs differ
Diameter
Expedition Enigmath41mm
Khaki Field Mechanical Power Reserve40mm
Power Reserve
Expedition Enigmath42h
Khaki Field Mechanical Power Reserve40h
Water Resistance
Expedition Enigmath200m
Khaki Field Mechanical Power Reserve100m
MSRP
Expedition Enigmath$599
Khaki Field Mechanical Power Reserve$1,025

Full specifications

Case

5 specs
Category
Tool
Field
Diameter
41mm
40mm
Thickness
12.8mm
11.95mm
Lug-to-Lug
47.5mm
48mm
Water Resistance
200m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
Miyota 9039,
H-23
Type
Automatic
Manual
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$599
$1,025

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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.

Boldr Expedition Enigmath

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 Field Mechanical Power Reserve

The Hamilton Khaki Field Mechanical Power Reserve is noted for its 40mm sandblasted case, filling a size gap in the Khaki Field line. It features a new H-23 hand-wound movement with an 80-hour power reserve and a functional power reserve indicator at 9 o'clock. The case is 11.95mm thick, which is described as noticeably thicker than other Khaki Field models, and its proportions differ from classic manual-wind versions. The movement includes a slipping spring to resynchronize the power reserve indicator after shocks. Overall, reviewers appreciate the addition of the power reserve complication to the hand-wound model, though one reviewer noted a preference for a contrasting color on the indicator.

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