Hamilton Khaki Field Mechanical Power ReservevsTimefactors PRS-36

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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-36
Diameter
40mm
37mm
Lug-to-Lug
48mm
44.8mm
lowest
Thickness
11.9mm
10.5mm
lowest
Water Resistance
100m
highest
50m
MSRP
$1,025
$530
lowest
Movement
Hamilton H-23
ETA Peseux 7040
Case
4 specsCrystal & Dial
2 specsMovement
2 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.
The Timefactors PRS-36 is praised for its classy, vintage-style design, featuring a thin and comfortable cushion case and a brushed aluminum dial, making it suitable as a formal watch. Owners note the 37mm case wears larger than its dimensions suggest, with a slim 10.5mm thickness. The manual-wind ETA Peseux 7040 movement is a highlight, contributing to the watch's value at its £395 price point. However, the included strap and its large buckle are widely considered undesirable and are often replaced for improved comfort and aesthetics. One owner expresses general dissatisfaction with Timefactors' designs. Overall, owners rate the Timefactors PRS-36 highly for its vintage styling and comfortable wearability at an accessible price.
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