Strap for Aquis Chronograph 43.5 Smiley Face

The lug width of the Oris Aquis 01 771 7793 4155-07 8 23 01PEB is 23mm. This measurement is consistent across the entire Aquis collection with a 43.50mm case and should be verified by positioning a digital calliper between the case lugs at the precise point where the strap attaches. All 23mm aftermarket straps are fully compatible with this model.

The choice depends on intended use: for professional diving, an FKM (Viton) rubber strap with a stainless steel deployante offers absolute waterproofing and chemical resistance; for formal-daily wear, vegetable-tanned calf leather delivers natural patina and elegance; for collectors alternating environments, alligator with vegetable tanning combines grace with structural durability. A polyacrylonitrile NATO strap remains the pragmatic choice for those seeking practicality without compromise.

To change the strap, you must remove the spring bars connecting the case to the strap lugs. Use a dedicated spring bar tool to compress the internal spring and slide the pin out of its housing. Proceed slowly to avoid damaging the case lugs. Repeat on the second side. Insert the new strap by aligning the holes with the pins and compress again until you hear the click confirming closure. If you lack the specific tool, consult a professional watchmaker.

Any strap with a 23mm lug width is compatible with the model 01 771 7793 4155-07 8 23 01PEB. Compatibility depends solely on lug width, regardless of brand or material. On milanostraps.it, a curated collection of handcrafted straps in leather, alligator, shell cordovan, calf and rubber is available, all configured for 23mm lugs and customisable according to the owner's colour and stylistic preferences.

A genuine leather strap with vegetable tanning typically lasts 3–5 years with daily use, provided proper seasonal maintenance is observed (cleaning with a dry soft cloth, preventative treatments with natural waxes every 6 months, rapid drying after humidity exposure). On a diving watch like the Aquis, where water exposure is frequent, durability decreases to 18–36 months unless the strap is specifically treated for marine environments. FKM rubber straps maintain structural integrity for 5–7 years, provided they are not exposed to extreme temperatures or prolonged UV radiation.