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The Khaki Field Mechanical 42mm is Hamilton's contemporary-proportioned take on the manual-wind field watch, using the same H-50 movement as the smaller 38mm but in a case that reads as a modern daily wearer rather than a period piece. At this size and price point, few watches offer a legitimate hand-wound movement, a legible field dial, and a case built to take real use. This is the ref to buy if you want the Khaki Field experience on a wrist that proportions better with 42mm, with no mechanical compromises for the extra case width.
Hamilton introduced the Khaki Field Mechanical 42mm in 2018 as a larger companion to the 38mm ref, both sharing the H-50 caliber. The H-50 is a rebadged ETA 2801-2, a Swiss-made manual-wind movement with a 80-hour power reserve that Hamilton sources from the Swatch Group. The 38mm has the longer historical lineage tracing to field watch designs from Hamilton's U.S. military supply work, while the 42mm was added specifically to serve buyers who find the 38mm undersized on modern wrists.
The reference has remained in continuous production since launch with no significant case or movement changes. Dial variants exist across the line, but the H69819530 ships on a khaki canvas NATO-style strap.
The H-50 is a hand-wind movement, so inspect the crown and stem carefully on any pre-owned example, since daily winding puts more mechanical stress on these components than a rotor-wound caliber. Verify the crown seals are intact, as the 50m water resistance is adequate for field use but only if the gaskets have been maintained. Check the canvas strap hardware for corrosion, particularly the buckle, which on older examples can pit if the watch has seen sweat or moisture without cleaning.
The 42mm case is sized differently from the 38mm, so confirm you are looking at the correct reference number if buying used, since the movements are identical and a seller listing incorrectly is an easy error.
New retail runs around $495 USD, and the secondary market sits at or slightly below that, with lightly used examples frequently trading in the $380-$430 range. There is no meaningful collector premium on this reference. The 38mm commands slightly more collector attention for its period-correct proportions, so the 42mm can represent better value if you simply want the movement and the field utility.
Gray market discounts of 10-15% off retail are common from authorized online dealers.
The H-50 (ETA 2801-2) is a well-supported caliber with service intervals of roughly 5-7 years under normal use. Hamilton's in-house service runs approximately $150-$250 depending on parts required. Independent watchmakers familiar with ETA movements can service it for less, and parts availability is strong given how widely the ETA 2801 platform is used across the industry.
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Lug tip wear is the primary condition concern on used 42mm Khaki Field Mechanical examples; inspect under good light.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| case | Lug tip condition | Lug edges retain original sharpness or show minimal rounding consistent with normal wear | Heavily rounded lug tips or visible metal removal indicating aggressive polishing or heavy use |
| caseback | Cal. H-50 movement identity | Movement signed H-50 and Hamilton through the exhibition caseback | Unsigned ETA 2801-2 movement without Hamilton decoration indicating a movement swap |
| dial | Field watch dial and lume consistency | Uniform lume on all indices and hands; Arabic numerals at quarters with correct proportions |
| Mismatched lume aging between hands and dial indices indicating hand or index replacement |
