Strap for Perpetual Calendar 5320 White Gold / Rose

The lug width of the Patek Philippe Grand Complications 5320G-011 is 19 millimetres. This measurement represents the distance between the inner shoulders of the lugs and is essential for selecting a compatible strap. To verify it, use a digital calliper or millimetre ruler, positioning it between the lugs: the value must correspond precisely to 19 mm to guarantee a perfect fit without lateral play.

For the 5320G-011 in white gold with an ivory dial, alligator leather remains the most natural choice, as its regular grain harmonises perfectly with the refined formal character of the case. A dark brown or deep cognac alligator creates an elegant contrast with the white gold. Alternatively, calf leather with vegetable tanning offers a softer feel and a less formal aesthetic, ideal for daily rotation. Shell cordovan imparts a patina of discerning wear, whilst a premium canvas NATO ensures versatility between formal and casual occasions.

Changing the strap requires specific tools: a spring bar removal tool and a flat, protected work surface. Position the watch with the strap facing downwards, locate the spring bar (the metal bar connecting the strap to the lug), push it gently inwards with the dedicated tool, and withdraw the strap from the opposite side. Repeat the operation for the other side. Insert the new strap by sliding the lugs inside the spring until it clicks into place. If you are not experienced, consult a professional watchmaker or Casati Milano's service, which offers consultancy and personalisation.

Yes, provided the lug width is exactly 19 millimetres. High-quality artisanal straps, such as those offered by Milanostraps.it, guarantee flawless fit without constructive compromise. Compatibility is determined solely by lug width: a 19 mm strap attaches perfectly to the watch, regardless of material (alligator, calf, cordovan, canvas). We recommend selecting materials and finishes that respect the aesthetics of the piece: natural tones, finishes without lamination, European construction.

The durability of a leather strap depends on the material and frequency of use. A quality alligator strap, worn with rotation (not daily), lasts 4–6 years before replacement is required. A calf strap with vegetable tanning, featuring a softer feel, has an average lifespan of 3–5 years. Shell cordovan, thanks to its superior constructive density, can last 7–8 years. Exposure to sunlight, moisture and perspiration accelerates ageing. Casati Milano provides an 18-month warranty on all manufacturing defects and recommends periodic cleaning with specific products and storage in a dry environment to maximise strap longevity.