Strap for Annual Calendar 4936 White Gold Diamond Black Mother of Pearl

The Patek Philippe Complications 4936G-001 features a lug width of exactly 20 millimetres. This dimension is specific to wrists of elegant and medium-to-fine proportions. To verify it, insert a digital calliper between the two lateral lugs of the case: the measurement must correspond precisely to 20 mm. Do not confuse lug width with case thickness or dial diameter.

Alligator leather with vegetable tanning and natural grain represents the most harmonious choice. Black with grey undertones, cocoa brown, or antique grey create aesthetic continuity with the 18-carat white gold. Alternatively, shell cordovan develops profound lustre over time, whilst structured calf leather offers quotidian versatility without visual excess. Avoid synthetic materials or off-the-peg fabrics that fail to dialogue with the case's refinement.

Consulting a professional watchmaker or specialised atelier is highly advisable. The operation requires precision instruments (spring bar tool) and expert handling to prevent damage to the lugs. Casati Milano offers strap-change service with colour consultation and 18-month warranty on production defects. Never attempt a change at home without experience: the risk of scratching the case is significant.

Yes, provided it respects the exact 20-millimetre lug width. High-quality bespoke straps in alligator, calf and shell cordovan exist and are perfectly compatible. Ensure the strap is fitted with a compatible buckle or 18-carat white gold deployante (or titanium, if you prefer lightness). Aftermarket straps, if crafted by qualified artisans, can match or exceed factory strap quality.

A naturally tanned leather strap typically lasts 3–5 years if worn daily, up to 10+ years if used occasionally. Shell cordovan resists wear even longer due to its natural density. Alligator leather has intermediate robustness. Longevity depends on sun exposure, perspiration, humidity and frequency of wear. Proper care—periodic drying, protection from impacts, and leather conditioning every 6–12 months—significantly extends strap lifespan.