Hamilton’s Khaki Field line has always worked best when it stays close to the idea of a clear, robust everyday watch.
The Khaki Field Power Reserve 40mm adds a useful complication to that familiar formula, and now the model gets two dial colours that give it a broader personality without changing the hardware underneath.
The new matte olive green feels closest to the collection’s military roots, while the matte blue version gives the same watch a cleaner, more urban edge.
At a glance
- Hamilton has added matte green and matte blue dials to the Khaki Field Power Reserve 40mm collection.
- The watch keeps its hand-wound H-23 calibre with an 80-hour power reserve and a gauge-style display at 9 o’clock.
- Both colours are available now as permanent models, priced from CHF 765 or EUR 915 on a NATO strap.
A 40mm field case with a practical complication
The Khaki Field Power Reserve sits between Hamilton’s smaller hand-wound field watches and the larger 42mm executions, using a 40mm stainless steel case with a measured tool-watch stance.
At 11.95mm thick, it remains slim enough for daily wear, though the 48mm lug-to-lug span is worth noting for smaller wrists.
The case is fully sandblasted, giving the watch a muted, anti-reflective finish that suits the military-inspired brief better than polished surfaces would.
A sapphire crystal with anti-reflective coating protects the dial, while the solid screw-down steel caseback keeps the watch straightforward and functional.
Water resistance is rated to 100 metres, which is exactly where a modern field watch should be if it wants to feel genuinely usable rather than merely nostalgic.
Olive green and blue change the attitude
The olive green dial is the more traditional of the two new versions, and it naturally fits the Khaki Field design language.
Its matte surface keeps glare down and gives the warm lume and red power-reserve accents a clear, purposeful backdrop.
The blue dial changes the tone considerably.
It’s still matte and still field-oriented, but the mid-blue colour softens the military character and makes the watch feel more at home with casual city wear.
Both dials retain the familiar large Arabic hour numerals, a clean minute track and the inner 13 to 24-hour scale associated with field-watch layouts.
The triangular hour markers and hands are filled with Old Radium Super-LumiNova, which gives the display a vintage-tinted look without disturbing the overall legibility.
The defining feature remains the power reserve indicator at 9 o’clock.
Instead of hiding the movement’s energy state on the back or leaving the wearer to guess, Hamilton presents it as a small gauge with red F and E markings and a lumed triangular hand.
It’s an unusual detail for a field watch, but it makes particular sense here because the movement is manually wound.
The H-23 movement keeps the hand-wound format relevant
Inside is Hamilton’s calibre H-23, a hand-wound movement developed with ETA and related to the Powermatic 80 family.
More specifically, it evolves from the ETA 2801-2 architecture, the manually wound counterpart to the ETA 2824-2, with the additional power reserve indication integrated into the display.
The movement runs at 21,600 vibrations per hour, or 3Hz, and offers an 80-hour power reserve.
That long running time is the key detail, because it means the watch can be wound and then left over a weekend without necessarily stopping.
A Nivachron balance spring adds magnetic resistance, a useful modern upgrade in a watch designed to be worn rather than babied.
Hamilton also lists a slipping-spring differential mechanism among the movement’s technical details, tied to the power reserve system.
Strap, bracelet and availability
Hamilton offers each new dial on a colour-matched NATO textile strap with leather loops.
The green model comes on a green NATO with brown leather loops, while the blue version is paired with a blue NATO and black leather loops.
Both watches use a 20mm lug width, which should make aftermarket strap pairing easy for owners who like to rotate between textile, leather and bracelet options.
A sandblasted three-row stainless steel bracelet is also available, using a butterfly clasp and Hamilton’s EasyClick interchangeability system.
The NATO strap versions are priced at CHF 765 or EUR 915, while the bracelet versions are priced at CHF 845 or EUR 995.
All four configurations are available immediately and sit in the permanent collection.
Details & Specifications
| Brand | Hamilton |
|---|---|
| Model | Khaki Field Power Reserve 40mm |
| References | H69509960 green on NATO, H69509160 green on bracelet, H69509940 blue on NATO, H69509140 blue on bracelet |
| Case size | 40mm diameter, 11.95mm thickness, 48mm lug-to-lug |
| Case material | Sandblasted stainless steel |
| Crystal | Sapphire with anti-reflective coating |
| Caseback | Solid screw-down stainless steel |
| Water resistance | 100 metres |
| Dial | Matte olive green or matte mid-blue with 13 to 24-hour inner scale |
| Lume | Old Radium Super-LumiNova on hands and hour markers |
| Movement | Hamilton calibre H-23, hand-wound |
| Base architecture | Powermatic 80 family, related to ETA 2801-2 |
| Frequency | 21,600vph |
| Power reserve | 80 hours |
| Balance spring | Nivachron |
| Functions | Hours, minutes, seconds, power reserve indicator |
| Lug width | 20mm |
| Strap | Green NATO with brown leather loops or blue NATO with black leather loops |
| Bracelet option | Three-row sandblasted stainless steel bracelet with butterfly clasp and EasyClick interchangeability system |
| Price on NATO strap | CHF 765 or EUR 915 |
| Price on steel bracelet | CHF 845 or EUR 995 |
| Availability | Available now as permanent collection models |
The new green and blue Khaki Field Power Reserve 40mm models don’t radically alter Hamilton’s field-watch recipe, and that’s part of their appeal.
They add colour, preserve the practicality of the 80-hour hand-wound movement and keep the price in the accessible mechanical-watch space where the Khaki Field line has long made its strongest argument.
