Strap for Annual Calendar Chronograph 5960 Platinum / Blue

The lug width (ansa) of the Patek Philippe Complications 5960P-015 is 20 millimetres. This measurement is the distance between the two spring bar attachments on the case. To verify it precisely, use a digital calliper to measure the distance between the inner shoulders of the two lugs, not the strap width itself, which can vary due to compression.

The best strap for this watch depends on usage and aesthetic preference. High-quality alligator leather with vegetable tanning offers maximum visual contrast against the platinum case and develops a natural patina over time. For daily versatility, Italian calf in a tela shade (dark brown) permits rapid seasonal changes. Shell cordovan represents the option for those seeking maximum durability and deep patina development, whilst a NATO strap repositions the Complications towards pure functionality. Consult Casati Milano to select the leather that best aligns with your personal style in their atelier.

The strap change on the Patek Philippe Complications 5960P-015 is carried out via the spring bar mechanism. With the watch facing downwards, use a dedicated strap tool or a thin, flat implement to compress the spring bar from one side, thereby removing the old strap from the case. Insert the new strap ensuring the spring bar clicks into both lateral holes of the case lug. If unfamiliar with the process, consult a Patek Philippe-certified watchmaker or Casati Milano's appointment-based service.

Yes, any strap with a 20mm lug width is physically compatible with the Patek Philippe Complications 5960P-015. Aesthetic compatibility, however, depends upon construction quality and materials. Milanostraps.it offers a curated collection of 20mm straps crafted by Italian and international master artisans, designed specifically for luxury watches. A quality aftermarket strap—in premium alligator or Italian calf—can significantly elevate daily usability without aesthetic compromise.

The lifespan of a leather strap depends upon material choice, usage patterns, and storage conditions. Vegetable-tanned alligator typically lasts 5–8 years with daily wear, developing a remarkable patina over time. Italian calf resists for 3–4 years before replacement becomes necessary, particularly if exposed to moisture. Shell cordovan, owing to its natural density, can endure 10+ years. Casati Milano supplies straps with an 18-month warranty covering manufacturing defects, guaranteeing uncompromising quality. Regular maintenance—gentle cleaning and storage in dry conditions—extends longevity considerably.