Strap for Perpetual Calendar 5940G White Gold / Silver

The Patek Philippe 5940G-001 features a lug width of 18mm. This dimension is standard for the 37mm Complications collection and allows the watch to be equipped with compatible aftermarket straps, provided they are specifically manufactured for 18mm lugs. Always verify this measurement before purchasing a replacement strap.

For the Grand Complications 5940G-001, authentic alligator and vegetable-tanned calf leather straps are the most harmonious choices. Dark brown alligator emphasises the depth of the slate dial, whilst cognac-coloured calf offers elegant warm-cold contrast. For daily wear, black rubber maintains the connection to Patek Philippe's sporting heritage. An integrated deployante clasp is recommended for maximum comfort.

The strap is removed by unscrewing the spring bars from the case. On this model, it is advisable to entrust the task to an official Patek Philippe service centre or a specialist such as Casati Milano to avoid damaging the sapphire caseback and curved lugs. If you have experience, use a dedicated spring bar removal tool and work gently on the front of the case, not laterally.

All straps manufactured specifically for 18mm lug width are compatible with the 5940G-001. This includes original Patek Philippe straps from other 37mm models, as well as bespoke straps from independent makers such as Casati Milano. It is essential to verify that the strap is intended for 18mm and not 20mm or other dimensions, as different Aquanaut 42mm or modern Nautilus models use wider lugs.

A vegetable-tanned alligator strap lasts an average of 5–8 years of regular use (3–4 days per week). Shell cordovan has superior durability (8–12 years) due to material density, whilst common calf lasts 3–5 years. Patina and natural ageing are desirable on vegetable-tanned leather, whilst they enhance cordovan's appeal. Storing the watch in a safe when not worn significantly extends strap lifespan.