Strap for Classic Date 42 Stainless Steel / Ice Blue / Bracelet

The lug width is precisely 20mm. This measurement must be verified using a digital calliper positioned perpendicularly between the interior lugs of the watch. A stable reading between 19.8–20.1mm confirms compatibility. It is essential not to use analogue measuring instruments, as they can introduce errors exceeding 0.2mm, which would compromise strap fit.

We recommend either a vegetable-tanned alligator strap (cognac or black) or Tuscan calf leather (natural brown or black). Both materials maintain optimal proportions relative to the 42mm case and create harmonic dialogue with the satin-finished steel texture. For sporadic or daily use with high humidity exposure, a silk NATO strap or FKM rubber strap are technically sound alternatives.

The strap is replaced by removing the two spring bars (pernes) that connect the lugs to the case. You will use a dedicated tool (spring bar removal tool) to compress the internal spring and slide the bar outward. Position the case horizontally on a soft surface (watchmaking mat) to prevent accidental scratches. The procedure requires approximately 3–5 minutes for experienced users. We recommend visiting a jeweller if this is your first time.

Yes, provided the strap is manufactured with a 20mm lug width and the spring bar holes respect tolerances of 0.1–0.15mm per side. Custom-made artisanal straps guarantee total compatibility. Avoid non-specialised cut-to-size straps: the risk is visible space between lug and strap passage, which communicates poor craftsmanship. Always verify that the spring bars are 316L stainless steel, identical to the case material, for aesthetic coherence.

A premium leather strap (vegetable-tanned alligator or Tuscan calf) typically lasts 4–6 years with moderate daily use (35–40 hours weekly). Lifespan depends on exposure to humidity, perspiration, and direct UV rays. Vegetable-tanned leather develops patina over time, evolving chromatically and tactilely towards historical beauty. To extend life, apply a waxy protection cream (colourless aniline leather cream) every 3–4 months and store the strap in a cotton pouch, away from direct heat sources.