Oris
ProPilot 01 751 7761 4164-07 8 20 08— lug 20mm

The lug width is 20 millimetres. This measurement must be verified by placing a digital calliper parallel to the dial between the two strap attachment lugs. Precise measurement is essential for selecting compatible aftermarket straps without risk of excessive looseness or mounting difficulties.

The ideal strap depends on intended use. Alligator leather in vegetable tanning offers elegance with natural ageing, perfect for office wear. Vulcanised rubber ensures resistance in humid and mountainous environments. Fabric NATO is the historical tactical choice, advantageous for rapid changes. Hammered chrome calf combines aesthetics and durability for versatile daily use.

Position the watch on a flat surface with the dial facing downwards. Locate the attachment pins at the 6 and 12 o'clock positions on the lug. Using a spring bar tool, gently press the pin to insert the tool tip into the small cavity, then extract the pin. Repeat on the opposite side. Insert the new strap by aligning the horizontal pins into the watch case seats, pressing until the click of engagement.

All straps with a 20-millimetre lug width are compatible. You can choose between full-grain leather (alligator, calf, veg-tan calf), fabric NATO, and technical rubber. Verify that the width corresponds exactly to 20mm to avoid dangerous play. Milan Straps straps for 20mm lug width are specifically tested on watches with identical lug dimensions.

A quality leather strap on a daily-wear wristwatch typically lasts 3 to 5 years, depending on intensity of use and care. Vegetable-tanned leather tends to last longer due to natural tanning. Moisture, perspiration and direct sun exposure accelerate wear. Rotation with a second strap significantly extends the overall accessory longevity.