Strap for De Ville Byzantium Co-Axial 33.4 Co-Axial Stainless Steel / Black / Russia

The lug width of the De Ville 7802.50.31 is 17mm. This measurement is determined by the internal distance between the two lugs of the case and represents the standard width for compatible straps. You can verify it by measuring directly with a digital caliper positioned perpendicularly between the lugs.

For the De Ville 7802.50.31 we recommend alligator for formal authenticity, calf leather for discreet elegance, and shell cordovan for those seeking a deep patina that evolves over time. All materials pair harmoniously with the satin-finished steel case. Your choice depends on your style: alligator for special occasions, calf leather for daily wear, cordovan for those who appreciate history in their strap.

Changing the strap on a De Ville is done by removing the lugs using a spring bar tool. Rest the watch on a soft surface, insert the tool under the lug from the side you want to free, gently press to release the internal spring, and repeat from the other side. Insert the new strap by aligning one lug first, then the other. We recommend performing this operation on an anti-scratch cloth to protect the case.

Yes, absolutely. All 17mm straps are compatible with the De Ville 7802.50.31, regardless of brand. Compatibility is determined by the lug width, not the manufacturer. We recommend choosing artisanal quality straps, such as those made with vegetable tanning and hand stitching, to ensure durability and aesthetics worthy of your Swiss watch.

The lifespan of a leather strap depends on daily use and the type of leather. A quality calf leather with vegetable tanning lasts on average 2-3 years with regular use. Shell cordovan is more resistant and can last 3-5 years. Alligator has an intermediate durability of 2-4 years. Periodic maintenance (cleaning with a damp cloth, protection from sweat and moisture) significantly extends the strap's lifespan. Casati Milano offers an 18-month warranty on all custom straps.