Strap for Oyster Perpetual 31 Stainless Steel / Pink

The lug width (also called ansa or spring bar distance) of the Rolex Oyster Perpetual 31 reference 277200-0009 is 16 millimetres. This measurement is precise and non-negotiable: any strap must respect this millimetric tolerance to ensure a correct fit on the case. Measure the internal distance between the two lugs (the metal attachment spurs) to verify compatibility with an aftermarket strap.

For the 277200-0009 we recommend alligator leather (dark brown or burgundy) for formal elegance, calf leather with vegetable tanning for natural patina over time, or vulcanised rubber for sportive versatility. Choice depends on usage: alligator for formal occasions, calf for daily wear, rubber for travel. All options maintain the aesthetic proportion of the 31mm case.

Strap replacement requires a spring bar tool (small lever implement). Position the watch on a soft surface with the case facing downwards, insert the tool into the slot beneath one of the lugs to disengage the spring bar, remove the old strap and insert the new one the same way. Alternatively, Casati Milano performs strap changes free of charge at the atelier for straps purchased through us.

Yes, provided the lug width is exactly 16mm. Always verify the technical specifications of the strap before purchase. Milano Straps straps are specifically developed for compatibility with Rolex 16mm lugs and guaranteed with a fit certification. Avoid generic straps: millimetric precision is essential to preserve the model's aesthetics.

A quality leather strap (alligator, calf with vegetable tanning) typically lasts 3-5 years with daily wear. Longevity depends on usage frequency, moisture and heat exposure, and care. An alligator strap resists longer than standard calf. Milano Straps offers an 18-month guarantee against manufacturing defects. We recommend rotating straps if you own multiple models.