Rolex · Oyster Perpetual 31
Strap for Oyster Perpetual 31 Stainless Steel / Turquoise
Takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
The Oyster Perpetual 31 277200-0007 (aka: M277200-0001), seen from the bench
Frequently asked questions
What is the lug width of the Rolex Oyster Perpetual 31 277200-0007?
The Rolex Oyster Perpetual 31 277200-0007 features a lug width of 16 millimetres. This dimension is specific to the 31mm Oyster Perpetual models and requires straps explicitly dimensioned to ensure correct fitment at the wrist, preventing excessive play or abnormal pressure on the spring bars.
Which strap materials are recommended for this 31mm Rolex?
For the 277200-0007, ideal choices include alligator leather for formal sophistication, superior calf for daily versatility, rubber Tropic for sports aesthetics, and silk-interwoven NATO straps for casual occasions. Material selection depends on intended use and dial colour: dark dials complement light leather, whilst champagne tones harmonise naturally with honey or cognac-hued hide.
How do I correctly measure the lug width on a watch?
Lug width is determined by measuring the distance between the two spring bar pins that connect the strap to the case. Position a digital calliper or millimetre ruler perpendicular to both pins: for the 277200-0007, the reading must be 16mm. Verify overall strap length as well: typically 75–80mm on the wrist side and 115–120mm on the buckle side.
Can I use aftermarket straps with my Oyster Perpetual 31 277200-0007?
Yes, provided they conform to the 16mm lug width specification. Artisanal aftermarket straps offer superior customisation compared to original Rolex variants: you may select leather type, colour, closure mechanism (deployante clasp, traditional buckle, single-pass design) and even texture and desired patina development. Always verify construction quality and compatibility with your case's spring bar pins.
What is the typical lifespan of a natural leather watch strap?
A quality strap crafted using vegetable tanning, such as those from Casati Milano, typically lasts 4–7 years with daily wear, accounting for hide, stitching and finishing. Longevity depends on: frequency of use, climatic conditions (humidity accelerates degradation), and periodic care and maintenance. The patina that develops over time is desirable, adding character; when leather becomes excessively worn or shows structural cracking, strap replacement is warranted whilst keeping the case spring bars intact.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

