Hamilton

Railroad Auto Chrono

Reference Number :

H40656781

Series : American Classic

Retail: $2,095

(As of: 07/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Hamilton. If you are interested in selling this watch to us, you can contact us here.

Quick TakeThis isn't just a watch; it's a piece of rolling history for your wrist. The Hamilton Railroad Auto Chrono feels like an artifact from the golden age of American innovation, completely reimagined for the modern era. Its complex silver dial acts as a sophisticated instrument panel, where the vibrant blue accents on the sub-dials and tachymeter feel drawn from vintage industrial blueprints. There's a tangible connection to an era of powerful engines and relentless progress. Powering this intricate machine is the robust H-21 automatic movement, a true workhorse that stores an impressive 60 hours of energy, easily lasting through a long weekend expedition. A glance through the exhibition case back reveals the mesmerizing choreography of the mechanism and the signature "H" on the bridge, a subtle yet confident mark of its heritage. To wear this chronograph is to carry that spirit of precision and ambition, a perfect mechanical partner for a life measured by milestones, not just minutes.

DescriptionThe architecture of reference H40656781 centers on a 44mm diameter stainless steel case with a vertical thickness of 15.3mm. This housing is engineered with a 22mm lug width to accommodate the strap and features an open case back, providing a transparent view of the internal mechanism. Protecting the dial is a sapphire crystal treated with an anti-reflection coating to maximize readability across diverse lighting environments. The case assembly is certified for water resistance up to 5 bar, which corresponds to a static pressure at 50 meters or 73 PSI, ensuring integrity against incidental water contact. The silver dial is equipped with both chronograph and date functions, with sub-dials and an aperture positioned for clear data access.

Propulsion for this timepiece is supplied by the Caliber H-21, an automatic chronograph movement. This mechanism is notable for its extended 60-hour power reserve, offering enhanced operational autonomy compared to conventional movements. A specific aesthetic detail of the Caliber H-21 is the "H" pattern embellishment on its oscillating bridge, a design element unique to the manufacturer. The watch is affixed to the wrist via a calf leather strap, designated by the reference number H6004051011. This strap is paired with a folding clasp made of stainless steel, which has a corresponding buckle width of 20mm to ensure a secure closure and a cohesive material profile with the case.

GenderMen

SignaturesHamilton

Country of OriginSwitzerland

Case Size44 mm

MovementAutomatic

CaliberH-21

FunctionsChronograph, Hours, Minutes, Seconds, Date

Power Reserve60 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal