Strap for Classic 38 Stainless Steel / Yellow Gold / Fluted / Silver-Diamond / Bracelet

The lug width of the Tudor Classic 21013-0009 is 20 millimetres. This measurement represents the internal distance between the two lugs (spring bar notches) on the case where the strap is anchored. To verify this measurement accurately, use a vernier calliper and measure the space between the lugs in a perpendicular position relative to the case. A precise measurement is essential to ensure perfect strap fit.

For the Tudor Classic 21013-0009, alligator leather straps with vegetable tanning represent the most noble and formal choice. Alternatively, European calf leather in smooth or grained finish offers an excellent balance between elegance and practicality. For casual or sporty use, a cotton-nylon NATO strap is robust and versatile. Black and dark brown colours best enhance the steel-and-yellow-gold bi-metal case.

To change the strap, you will need a spring bar removal tool. Position the watch with the strap facing downwards, identify the small metal bars (spring bars) beneath the lugs, and gently press or extract the spring bar using the dedicated tool. This will release the old strap from the lugs. Insert the new strap by aligning the holes with the lugs and press the spring bar again until it locks into place. Verify that the strap is firmly secured before wearing the watch.

Yes, any strap with a 20-millimetre lug width is compatible with the Tudor Classic 21013-0009. Quality aftermarket straps in alligator, calf, NATO, or rubber are perfectly suitable. We recommend choosing materials and finishes that respect the formal and understated character of the Classic: black and neutral tones maintain aesthetic coherence with the original design. A custom-made strap from Casati Milano ensures a perfect fit and 18-month warranty.

A quality leather strap (alligator or calf) has an average lifespan of 5–7 years with regular use and routine maintenance. Longevity depends on environment (humidity, sun exposure), frequency of use, and care applied. Vegetable-tanned leather tends to age gracefully, developing patina and gaining character over time. To extend the strap's useful life, avoid prolonged direct sun exposure, keep the strap dry, and occasionally apply a specific leather conditioner. Rubber or NATO straps typically have a longer lifespan, up to 8–10 years.