Strap for Perpetual Calendar 5140 Platinum / Grey

The lug width of the 5140P-017 is 18 mm. This measurement represents the internal distance between the two lugs of the case where the strap is attached. A compatible strap must have a maximum width of 18 mm at the attachment point. Measuring the lug width accurately is essential to avoid damage to the case and dial.

For the 5140P-017, alligator niloticus with rectilinear grain and natural patina is the ideal material. The contrast between the enamelled blue dial and a cognac or tobacco-toned alligator creates an extraordinary aesthetic pairing. Alternatively, vegetable-tanned calf leather offers softness and a patina that evolves over time, whilst shell cordovan provides structural rigidity ideal for a timepiece of capital value.

Strap replacement requires the use of a springbar tool to release the elastic pins that hold the strap to the lugs. Carefully position the tool in the lower groove of the lug, push upward to compress the pin, then remove the old strap. Insert the new strap by aligning the holes with the elastic pins. Verify that the strap is symmetrical and fully secured before wearing the watch.

Yes, you may use high-quality aftermarket straps provided they respect the 18 mm lug width and are made from compatible materials (alligator, calf leather, or shell cordovan of watchmaking grade). An artisanal strap crafted by specialised masters ensures durability and aesthetics consistent with the watch's value. Avoid low-quality products that could damage the delicate platinum lugs.

A high-quality watchmaking leather strap (alligator, vegetable-tanned calf, shell cordovan) lasts an average of 3–5 years with moderate daily wear. Lifespan depends on factors such as frequency of wear, exposure to perspiration and humidity, and maintenance. Natural leather tends to dry over time: periodically applying balms specific to watchmaking leather significantly extends strap life. A well-crafted artisanal strap is designed to be replaceable without damaging the case.