Strap for Railroad 44 Small Seconds Yellow Gold / Silver

The lug width (misura ansa) of the Hamilton Railroad H40645555 is 22mm. This measurement is taken between the spring bar lugs on the case—the two metal pins that support the strap. This specification is determined by the proportions of the 44mm case and cannot be modified. Always verify this measurement before purchasing a replacement strap, as 20mm or 24mm straps will not be compatible.

The Railroad H40645555 pairs beautifully with Italian vegetable-tanned leather straps, which develop rich patina over time and maintain the original railroad aesthetic. For a more refined approach, black or cognac alligator offers a uniform grain and sophisticated sheen. For versatility, 22mm NATO fabric straps allow quick colour changes. For sports or wet environments, FKM rubber is the most technically appropriate choice. A steel deployant clasp is recommended for leather straps, ensuring secure closure and even pressure distribution.

To change the strap, you will need a spring bar tool. Insert the tip of the tool into the small hole on the side of one lug and gently lift until the spring bar clicks down and out. Repeat on the other side. Your new 22mm strap has holes calibrated for the same spring bars: align them and insert the bar into the hole, pushing until it clicks. The operation takes just a few minutes and requires no specialist skills.

Yes, any strap with a 22mm lug width is compatible with the Railroad H40645555. This includes leather, alligator, NATO fabric, rubber, and other materials. Compatibility is guaranteed by the standardisation of lug width: the case's spring bars are universal and accommodate any 22mm strap from any manufacturer. We recommend choosing high-quality straps to enhance the robust construction of the Hamilton timepiece.

A strap in Italian vegetable-tanned leather, subjected to moderate daily wear, has an average lifespan of 3–5 years. Duration depends on sun exposure, ambient humidity, frequency of wear, and care. An alligator strap, due to the density of the hide, typically lasts 5–7 years. The steel deployant clasp is wear-resistant and remains functional indefinitely. To extend strap life, avoid prolonged exposure to water and perspiration, and occasionally apply natural oils to maintain softness and elasticity.