Strap for Pilot Chronograph Staineless Steel / Black

The lug width of the Archimede Pilot UA7939-C1.3 is 20mm. This measurement represents the internal distance between the lug ends and determines which strap is compatible with the watch. Always measure this distance perpendicularly from the centre of one lug end to the centre of the opposite end for maximum accuracy.

For the Pilot UA7939-C1.3, straps in alligator leather with vegetable tanning, full-grain calf leather, or NATO fabrics in cotton or polyamide are recommended. Vegetable-tanned alligator develops natural patina over time, calf leather offers visual solidity, whilst NATO fabric provides tactical practicality and security. Choice depends on context of use: formal-casual for leather, sportive-avionic for fabric.

To change the strap, use a spring bar tool (tool for removing the anchor springs). Position the tool under the lug end, exert inward pressure to compress the spring, then withdraw the lug end from the slot. Repeat on the opposite side. Insert the new strap by threading the lug ends into the housings, ensuring the spring snaps correctly into the anchor position.

Yes, any strap with a 20mm lug width is compatible with the Pilot UA7939-C1.3. Artisanal aftermarket straps often offer superior construction quality compared to OEM models, with more refined leather working, bespoke finishings and natural ageing of materials. Always verify that the declared width is exactly 20mm.

A high-quality leather strap (alligator, calf, cordovan) lasts between 3 and 7 years with regular use, varying based on climate, frequency of use and tanning quality. Leather with vegetable tanning ages better and can last beyond 7 years, developing patina and aesthetic character. Synthetic leather or low-quality straps wear out between 1 and 2 years.