Strap for Marine Torpilleur Moonphase Stainless Steel / Blue / Alligator

The lug width (ansa width) of the Ulysse Nardin Marine 1193-310LE-3A-175/1B is 21mm. Measure this specification with a digital calliper between the two internal lateral lugs of the case. Accurate measurement is critical for selecting the correct strap and avoiding wear from improper sizing.

For the Marine 1193-310LE, we recommend vegetable-tanned alligator (dark brown or black) for formal elegance, fine-grain calf leather for comfort and versatility, or ballistic NATO in mil-spec canvas for rotational sports use. Choice depends on intended application: nautical-formal suggests alligator, daily wear requires calf, sports versatility demands NATO.

Use a spring bar remover tool (double-ended instrument) to compress the elastic pins (spring bars) from the case, inserting the tip into the small hole at the end of each pin. Compress firmly, remove the old strap, and align the new strap holes with the pins. Verify final tension by gently pulling the strap.

Yes, a 21mm strap from a reputable source is compatible. Verify lug width before shipment and confirm the strap exhibits neither play (undersizing) nor friction (oversizing). Swiss and Italian artisan straps maintain tolerances of ±0.2mm essential for the 1193-310LE.

A quality leather strap in alligator or vegetable-tanned calf leather will last 3-5 years under regular daily use (5-6 days per week). Durability depends on humidity exposure, frequency of wear, preventive care (cleaning and conditioning), and rotation with additional straps to reduce mechanical fatigue.