As an entry into the world of mechanical watches, few packages are more compelling than Hamilton’s Khaki Field watch. The model offers a real-deal movement and category-defining looks for less than $700. On Tuesday, the brand announced the Khaki Field Mechanical 250, a new-and-improved special edition that takes inspiration from one of its most collectible vintage models and even slims down the proportions.
Hamilton has plenty of references to pull from. The brand has a rich history in American railroad expansion, early aviation, and decades of military timekeeping. The very best Hamilton releases manage to feel less like nostalgia and more like a direct continuation of that storied lineage. The new Khaki Field Mechanical 250 falls squarely into that latter category.
Released to commemorate America’s upcoming 250th birthday, it’s limited to 1,776 pieces—a fitting nod to the year America was founded. More importantly, it’s a model that ties Hamilton’s American roots to one of the brand’s most intriguing military references, the little-known FAPD 5101 navigator’s watch developed for the US Air Force in the early 1970s.
The original FAPD 5101 was something of an oddball in Hamilton’s military lineup. The watch was issued during the Vietnam War era and was produced only briefly and featured a 36mm parkerized steel case slightly larger than that of many contemporary field watches. (Many of these, produced by Hamilton and fellow military supplier Benrus, measured 34mm.) Inside was the Hamilton Caliber 684, a 17-jewel hand-wound movement developed specifically for the model and never used anywhere else. Unsurprisingly, surviving examples have become something of a grail for collectors of vintage American military watches.
Hamilton
Khaki Field Mechanical 250
This new anniversary edition channels that watch closely, beginning with the size. The stainless-steel case measures 36mm across and just over 10mm thick, preserving the compact proportions that define the Khaki Field Mechanical line. Fixed strap bars—a hallmark of true military watches designed to prevent strap failure in the field—return here as well, reinforcing the model’s utilitarian roots. Even the crystal—a box-shaped piece of acrylic with a hard coating that recreates the warm distortion and character of vintage plastic crystals—is deliberately old-school.
The dial remains as straightforward as you’d expect from a field watch. It’s rendered in matte black with high-contrast Arabic numerals and a 24-hour inner track. Hamilton uses Super-LumiNova Grade X2 on both the hands and markers, which delivers modern luminous performance while maintaining the warm, slightly aged tone that collectors associate with vintage tritium.