Strap for Tonneau Worldtimer Stainless Steel / Black

The lug width of the Oris Tonneau 01 690 7540 4064-07 5 20 44FC is 20 mm. This measurement is determined by the internal distance between the two lugs of the tonneau case and represents the compatibility standard for all aftermarket straps. When purchasing a strap, ensure it is explicitly declared for 20 mm: tolerances of ±0.5 mm can cause lateral movement or mounting difficulties.

The Oris Tonneau expresses itself best with premium leather straps: alligator, shell cordovan, or full-grain calf with vegetable tanning. The curvilinear geometry of the tonneau case naturally dialogues with the organic texture of leather. For a sportier approach, NATO straps in heavy canvas or structured FKM rubber maintain aesthetic coherence. Avoid industrially produced PVC or smooth rubber straps: they conflict with the watch's personality.

To change the strap, use a spring bar removal tool with a flat tip. Position the watch on a soft cloth, insert the tool's tip into the slot beneath the lug, apply gentle lateral pressure to release the internal spring, and slide the lug outward. Repeat on both sides. For new strap installation, align the strap with the lug and slide it into the groove until you feel the spring click back into position. Never force: the Tonneau has forged lugs that require no excessive effort.

Yes, provided the strap is declared for 20 mm lug width. MilanoStraps offers a curated selection of artisanal leather and rubber straps compatible with this measurement, crafted by manufacturers who understand the demands of the sophisticated wrist. Before purchase, verify that the strap specifies 20 mm compatibility: this is the assurance of proper fitting and tactile experience consistent with the watch's quality.

A premium leather strap—alligator, shell cordovan, or full-grain calf—withstands 3 to 7 years of regular wear, depending on intensity of use, ambient humidity, and maintenance. Vegetable-tanned leather tends to age more gracefully than industrial chrome tanning, developing a patina visually consistent with the case's steel ageing. To extend lifespan, avoid prolonged direct sunlight exposure, keep the strap dry, and if possible rotate between two straps to allow the leather to breathe and stabilise internal moisture.