Hamilton Khaki Field Mechanical Power ReservevsTimefactors PRS-57
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.
Khaki Field Mechanical Power Reserve
PRS-57
Diameter
40mm
40mm
Lug-to-Lug
48mm
46mm
lowest
Thickness
11.9mm
lowest
15mm
Water Resistance
100m
100m
Power Reserve
n/a
62h
MSRP
$1,025
lowest
$1,268
Movement
Hamilton H-23
Sellita SW510
Case
2 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Hamilton Khaki Field Mechanical Power Reserve is noted for its 40mm sandblasted case, filling a size gap in the line. It features a manual-wind H-23 movement with an 80-hour power reserve, indicated on the dial, though one reviewer wished the indicator was more visually distinct. The case is described as 11.95mm thick, which feels noticeably thicker than other Khaki Field models. Overall, owners and reviewers appreciate the Hamilton Khaki Field Mechanical Power Reserve for adding a functional complication to the manual-wind offering within an accessible price range.
The power reserve indicator at 9 o'clock is a functional addition to the classic design. The 40mm case size and 100m water resistance are noted strengths. Reviewers did not reach a consensus on weaknesses.
Owners widely praise the Timefactors PRS-57's 40mm sizing and sapphire crystal, with one owner finding its lume decent when fully charged, glowing dimly for at least twenty minutes. Some owners find the Smiths logo resembles breasts, and one commenter felt the watch looked too simple. The consensus is that owners rate the Timefactors PRS-57 highly for its comfortable wearability and classic design at the price.
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