Strap for Annual Calendar Chronograph 5961 Platinum / Blue

The lug width of the Patek Philippe Complications 5961P-001 is 18 mm. This measurement corresponds to the distance between the inner points of the two side lugs of the case. It is essential to measure this distance precisely to select a compatible strap that fits perfectly without play or forcing.

The ideal strap depends on the intended use. For formal and evening occasions, dark brown or black alligator creates visual balance with platinum. For daily or sports wear, cognac shell cordovan develops a rich patina over time. For contemporary style, a dark grey NATO canvas or black rubber streamlines the look whilst maintaining the chronograph's sporty vocation.

To change the strap, use a spring bar tool or specialist instrument to extract the steel pin (spring bar) that secures the strap to the lugs. Position the tool in the small lateral hole of the pin, apply gentle inward pressure to compress the internal spring, and carefully pull the strap downward. Once free, insert the new strap ensuring the pin re-enters both lugs completely. If you lack experience, entrust this operation to a specialist watchmaker to avoid damage to the case or lugs.

Yes, any strap with an 18 mm lug width is compatible with the 5961P-001, provided that the lug curvature respects that of the case (slightly curved inward) and that the strap's construction quality is consistent with Patek Philippe's prestige. Choosing a strap crafted in premium leather (alligator, shell cordovan, vegetable-tanned Italian leather) ensures superior longevity and aesthetic dignity befitting the platinum case.

Leather strap longevity depends on material, construction quality, and frequency of use. A quality alligator or shell cordovan strap, worn 4–5 days per week, has a useful life of 5–8 years before replacement becomes necessary for aesthetic reasons. More robust leather (vegetable-tanned with artisanal finishing) lasts slightly longer. A NATO canvas or fluoroelastomer rubber strap typically lasts 2–4 years depending on UV exposure and intensity of use. Casati Milano provides an 18-month warranty against manufacturing defects.