Hamilton

Railroad Small Second Auto

Reference Number :

H40515131

Series : American Classic

Retail: $1,475

(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 TakeForget everything you think you know about classic railroad watches. The Hamilton Railroad Small Second isn't just a nod to the past; it's a bold reimagining of a legend. While its ancestors were all about rigid precision and symmetrical legibility for conductors on a tight schedule, this modern classic throws a playful wrench in the works. The star of the show is the Caliber H-22's rebellious small seconds subdial, parked defiantly at 8 o'clock with a vibrant orange track. It’s a move that’s pure design swagger, breaking the dial’s balance in the most satisfying way. This isn't just a watch; it's a conversation starter wrapped in a rugged 42mm stainless steel case. With an automatic movement doing the hard work—visible through the open case back—and a tough, anti-reflective sapphire crystal up front, it’s built for the daily grind. It’s the perfect piece for someone who respects tradition but refuses to be bound by it, a functional work of art with a mischievous streak.

DescriptionThe timepiece designated by reference H40515131 is constructed with a stainless steel case measuring 42mm in diameter and 13.25mm in thickness. It features a lug width of 22mm, designed to integrate with its corresponding stainless steel bracelet, strap reference H6054051001, which secures with a folding clasp. The black dial is shielded by a sapphire crystal incorporating an anti-reflective coating for enhanced legibility. An open case back allows for direct observation of the internal mechanism. The unit is engineered for water resistance up to 5 bar, which is equivalent to a static pressure at 50 meters, 73 psi, or 164 feet. This specification indicates suitability for short periods of recreational swimming.

At the core of this watch from the American Classic collection is the Hamilton Caliber H-22, a self-winding automatic movement. Its primary functions include central hours and minutes, a date complication displayed via an aperture at the 3 o'clock position, and a distinctive small seconds subdial. The design of the H-22 movement facilitates the asymmetrical placement of this small seconds register at the 8 o'clock position, creating a unique dial layout. The mechanism operates with a power reserve of approximately 42 hours when fully wound, ensuring consistent performance over nearly two days without user activity. The specific arrangement of complications on the dial is a direct result of the caliber's specialized construction.

GenderMen

SignaturesHamilton

Country of OriginSwitzerland

Case Size42 mm

MovementAutomatic

CaliberH-22

FunctionsHours, Minutes, Seconds, Date

Power Reserve42 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal