Archimede
Pilot UA7939B-C1.1— lug 20mm
Archimede Pilot UA7939B-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 UA7939B-C1.1The essential strap measurement.
Browse 20mm straps →UA7939B-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 lug width of the Archimede Pilot UA7939B-C1.1?
The Archimede Pilot UA7939B-C1.1 features a lug width of 20mm. This dimension is determined by the geometry of the 42mm case and represents the standard for any aftermarket strap installation. Always verify the lug width before purchasing a replacement strap.
Which strap should I choose for the Archimede Pilot UA7939B-C1.1?
For a watch with this aviation heritage, we recommend premium natural leather straps—alligator or vegetable-tanned calf for a vintage aesthetic with evolving patina, or technical NATO and rubber straps for intensive use and humid environments. A honey-brown alligator strap complements the cream dial of the UA7939B-C1.1, whilst a smoke-grey calf offers contemporary contrast.
How do I change the strap on my Archimede Pilot UA7939B-C1.1?
Strap replacement requires two tools: a spring bar tool (or a gentle alternative such as a fine needle). Position the watch with the lug facing upward, insert the tool into the slot beneath the lug, press upward to release spring tension, extract the pin and release the old strap. Repeat on the opposite side. Install the new strap by reversing the procedure. A straightforward operation that requires no technical expertise.
Are Milano Straps compatible with the Archimede Pilot UA7939B-C1.1?
Yes, entirely. All our straps manufactured for the 20mm lug width have been constructed and tested specifically for watches with this dimension. The spring bars on every strap are sized to fit precisely and securely into the lug holes of the Pilot UA7939B-C1.1, with zero unwanted lateral play. Choose from our leather, NATO, or rubber collections in 20mm.
How long does a natural leather strap last on a daily-wear watch?
A high-quality leather strap, worn daily with minimal maintenance, typically lasts 18–36 months. Longevity depends on ambient humidity, frequency of water exposure, sun exposure, and tanning method. Vegetable-tanned alligator tends to outlast standard calf; however, the patina that develops is integral to the charm of authentic leather. Periodic strap replacement is a natural and recommended practice to preserve the overall aesthetic value of your watch.