Archimede
Pilot UA7939-C1.1— lug 20mm
Archimede Pilot UA7939-C1.1: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Archimede UA7939-C1.1The essential strap measurement.
Browse 20mm straps →UA7939-C1.1
ETA caliber 7750 Hours, Minutes, Small Seconds | Date, Day | Chronograph
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Pilot
FAQ
What is the exact lug width of the Archimede Pilot UA7939-C1.1?
The lug width of the Pilot is 20 millimetres. This measurement refers to the horizontal distance between the two lateral lugs on the case where the strap is installed. To verify, use a digital calliper or millimetre ruler: the measurement must be exact to ensure compatibility without play and without forcing during pin insertion.
Which strap pairs best with the black dial of the Archimede Pilot?
The ideal strap depends on intended wear context. For a classic and sophisticated result, vegetable-tanned leather in cognac or shell cordovan in deep burgundy create narrative contrast with the black. For minimalist and tactical styling, NATO in light grey canvas or off-white calf guarantee monochromatic coherence. For professional environments with humidity exposure, vulcanised black rubber with fine grain offers superior waterproofing and durability.
How do I change the strap on the Archimede Pilot UA7939-C1.1?
The strap is replaced by depressing the lateral pins from their seats. Position the watch on a soft surface (cotton cloth), then use a spring bar tool to apply gentle pressure to the spring support mechanism of the first pin. Once the first pin is extracted, you can remove the old strap and insert the new one while keeping the pin partially extracted. Finally, reinsert the pin into the opposite seat and verify secure anchorage. Avoid forced movements that could scratch the case.
Are there aftermarket straps compatible with the 20mm lug width of the Pilot?
Yes, 20mm lug width is a standard measurement across numerous market segments. Milanostraps.it offers artisanal leather straps from various sources (Italian, French), NATO in military-grade canvas, technical rubber straps, all with 20mm lugs. It is important to verify that the strap is specifically declared for 20mm and that construction quality meets professional standards, avoiding generic straps from unverifiable sources.
What is the lifespan of a natural leather strap for the Pilot?
A high-quality vegetable-tanned leather strap, used with rotation (alternating at least two straps), lasts an average of 4–6 years before replacement is necessary. Longevity depends on exposure to humidity, salt-infused perspiration, frequency of use and maintenance care. Vegetable tanning develops patina and natural cracking over time: this is an expected process, not degradation. A calibrated calf strap maintains stable aesthetic condition up to 5 years with regular wear; cordovan, given superior fibre density, can extend this window to 8 years.