AI Appraisal Estimate

This is a Hamilton Khaki X-Wind Automatic Chronograph, a high-performance pilot's watch. The piece features a substantial stainless steel case, approximately 44mm in diameter, paired with a matching multi-link stainless steel bracelet. The silver-toned sunray dial is highly complex, featuring three sub-dials at the 12, 6, and 3 o'clock positions, alongside a day-date window at 9 o'clock. A defining characteristic of the X-Wind model is its multi-crown configuration, including three screw-down crowns and two pushers, which operate the internal rotating bezels designed for crosswind calculations. The watch employs a Valjoux 7750-based automatic movement, visible through the markings 'Hamilton Khaki Automatic 25 Jewels'. The crystal appears to be sapphire, though it shows some surface smudging. The overall condition is good, showing typical signs of light wear and minor scuffing on the polished surfaces of the bracelet and bezel, consistent with regular use. The hands are Lumibrite-filled for visibility, and the bezel features a black tachymeter scale. This modern tool watch represents contemporary Swiss-made aviation horology, blending rugged durability with technical sophistication.

I have completed a visual examination of the Hamilton Khaki X-Wind Automatic Chronograph. This particular reference is a cornerstone of Hamilton's aviation line, featuring the robust H-21 movement (based on the legendary Valjoux 7750). The 44mm stainless steel construction and the intricate drift-angle calculator logic make this a highly sought-after tool watch. Based on the images provided, I observe minor surface scuffing on the polished bezel and bracelet links, consistent with 'Good' pre-owned condition. The silver sunray dial appears pristine with sharp printing on the sub-dials. The market for this model is stable; while not an exceptionally rare piece, it maintains high demand due to its 'instrument' aesthetic and Swiss pedigree. Comparables on the secondary market typically range from $700 to $1,100 depending on service history and the presence of original packaging. The inclusion of the stainless steel bracelet over the leather strap option slightly increases the current valuation. However, there are limitations to this digital appraisal. I cannot verify the mechanical health, power reserve, or water resistance without a physical pressure test and timegrapher analysis. To fully authenticate the piece, I would need to inspect the movement's finishing under magnification to ensures its legitimacy versus high-quality replicas. A verification of the reference and serial numbers against Hamilton’s database and an inspection of the original bill of sale/warranty card would be required for a definitive valuation at the higher end of the spectrum.