Strap for Marine Torpilleur Stainless Steel / Blue / Alligator

The 1183-310/43 model features a lug width of 21 millimetres. This dimension is critical for selecting an aftermarket strap and must be verified with precision using a digital calliper positioned between the inner shoulders of the lugs, parallel to the dial. Any variation, however minor (20 or 22 millimetres), would result in mechanical instability or excessive constructive tension. Always consult official Ulysse Nardin technical specifications prior to commissioning a bespoke strap.

For this satin-finished stainless steel case measuring 42 millimetres, alligator leather tanned through vegetable methods represents the supreme aesthetic choice, owing to the natural texture of reptilian skin and the patina it develops over time. Alternatively, vegetable-tanned calf offers a uniform grain and consistent wear. For intensive use, a cotton-woven NATO guarantees versatility. FKM rubber is ideal for humid climates or salt-water environments. A stainless steel deployante facilitates rapid changing without specialist tools.

Strap changing requires spring bar removal tools designed for this purpose. Position the watch on a scratch-resistant mat, locate the small spring retained within the lug, gently depress it downward using the removal tool and slide the bar laterally outward. Never apply excessive force, as the case metal may scratch. Proceed from the wrist-facing side first to stabilise the watch. Reverse the sequence for the new strap. If uncertain, consult an authorised service centre.

Yes, any strap with a 21-millimetre lug width is dimensionally compatible. However, construction quality, tanning method and buckle or deployante finishing significantly influence the overall perception of the instrument. Artisanal straps made from vegetable-tanned leather by Milano Straps ensure aesthetic coherence and durability that industrial products do not achieve. Always verify that the attachment (spring bar) conforms to the inner shoulders of your specific case.

A high-quality vegetable-tanned leather strap maintains functional integrity between 3 and 5 years of regular use (4–5 days weekly), provided it is protected from prolonged excessive moisture and intense direct heat sources. Surface patina and micro-cracking are normal and testify to the biological ageing of the material. Wear accelerates significantly in salt-water or tropical environments. A cotton-woven NATO lasts 2–3 years before visible fibre breakage occurs. FKM rubber retains elasticity up to 4–6 years without appreciable degradation. Seasonal rotation among multiple straps extends the longevity of each.