Archimede
Klassik UA7939-C2.31— lug 18mm
Archimede Klassik UA7939-C2.31: 18mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 18mm lug width to preserve the original sartorial balance."
Technical Specifications
Archimede UA7939-C2.31The essential strap measurement.
Browse 18mm straps →UA7939-C2.31
ETA caliber 7750 Hours, Minutes, Small Seconds | Date, Day | Chronograph
The Heritage
Compatible Straps
Selected for the 18mm lug width of the Klassik
FAQ
What is the lug width of the Archimede Klassik UA7939-C2.31?
The Archimede Klassik UA7939-C2.31 features a lug width of 18mm. This dimension is standard for this model and must be observed precisely to ensure proper strap fitting. To verify compatibility, measure the internal distance between the two lugs at their widest point: the value must be exactly 18mm.
Which type of strap is best suited for the Archimede Klassik UA7939-C2.31?
For the Klassik UA7939-C2.31, we recommend straps in alligator leather with fine grain (belly cut) or shell cordovan for formal wear. These materials maintain aesthetic coherence with the case's design discipline. For sport-elegant use, vegetable-tanned calf leather offers practical versatility. For aquatic environments or intensive use, FKM rubber is the most suitable solution.
How do I change the strap on the Archimede Klassik UA7939-C2.31?
To change the strap, position the watch on a flat surface. Use a spring bar removal tool or a thin screwdriver to gently push the elastic pins at the strap ends, releasing the internal spring. Remove the old strap, then insert the new one, ensuring the lugs fit correctly into the case's lug slots. Verify that the new strap is perfectly centred before fastening.
Is the Archimede Klassik UA7939-C2.31 compatible with third-party 18mm straps?
Yes, the Klassik UA7939-C2.31 is fully compatible with certified aftermarket straps specified for 18mm lug width. We recommend verifying that the strap is manufactured to high quality standards to avoid compromising the case's solid construction. Specialist strap manufacturers guarantee dimensional accuracy and finishes coherent with the watch's design language.
What is the average lifespan of a leather strap on this watch?
A premium quality leather strap (alligator, shell cordovan, or vegetable-tanned calf) on a wristwatch with moderate daily use typically lasts 5–7 years. Deterioration depends on exposure to moisture, direct sunlight, and perspiration. Regular maintenance (conditioning with specialist creams, drying after wetting) significantly extends durability. Nylon NATO straps in high-density fabric have greater longevity, up to 10+ years with proper care.