Strap for Heritage Perpetual Calendar

The H. Moser & Cie Heritage 8341-0400 features a lug width of 20 millimetres. This measurement is essential for selecting the correct strap: an incompatible width will either fail to fit into the lugs or cause instability. To measure accurately, place a calliper between the two lug terminals at their narrowest point.

We recommend alligator straps with fine grain texture, vegetable-tanned calf leather, or shell cordovan in cognac, tobacco warm tones, or natural aged finishes. These coordinate elegantly with the smoked dial. For practicality, a NATO in sand beige or navy blue maintains the Heritage aesthetic. Sophisticated grey rubber offers a versatile daily alternative.

Use a spring bar tool for this procedure. Position the watch horizontally, insert the flat end of the tool into the spring bar slot, and lift gently until the pin releases. Repeat on the opposite side. Insert the new spring bars through the lug holes and ensure the spring mechanism closes with a slight tug. For non-standard integrated lugs, consult Atelier Casati Milano for bespoke modifications.

Yes, provided the lug width is exactly 20 millimetres. Milano Straps offers a comprehensive collection of artisan-crafted 20mm straps designed for luxury watches. All our straps are produced from premium materials—alligator, calf, cordovan—and can be customized. Always verify specifications before ordering.

A high-quality leather strap (alligator, calf, cordovan) typically lasts 3–5 years under regular use, depending on climate, frequency, and maintenance. Vegetable-tanned leather ages beautifully, developing a noble patina. Shell cordovan, being denser and more resilient, often lasts 7–10 years or longer. Periodic maintenance with protective creams significantly extends longevity.