Strap for Classic 38 Stainless Steel / Yellow Gold / Fluted / White / Bracelet

The lug width of the Tudor Classic 21013-0004 is 20mm. This measurement must be verified with a digital calliper positioned perpendicular between the two lugs of the case, from the internal point of one to the other. It is essential not to confuse lug width with case diameter, which in this model is 38mm. A tolerance of ±0.2mm is generally acceptable, but for optimal fitment we recommend maintaining precision at exactly 20.00mm.

The best choice depends on intended use and aesthetic preferences. For absolute luxury, we recommend African alligator in vegetable tanning (black or dark brown), which creates a sophisticated dialogue with the two-tone gold/steel case. For daily colour stability, Italian box calf represents the ideal compromise between elegance and practicality. For a sports-oriented approach, a Cordura canvas NATO strap is legitimate and changeable without tools. FKM rubber is the technical solution for humid conditions or casual activities.

Obtain a spring bar tool (specific instrument with two curved ends) and a soft cloth. Position the watch on a stable surface with strap facing upward. Insert the tool tip into the slot under the lug, gently compressing the internal spring mechanism. When the bar retracts, you can remove the worn strap. Repeat on the other side. To install the new 20mm strap, align the hole and carefully reinsert the spring bar until it clicks into place. Verify that the strap is securely fastened to both lugs before wearing.

Yes, provided it is certified for 20mm lug width. Quality aftermarket straps (alligator, calf, NATO) are completely compatible with the Tudor Classic 21013-0004. The key is to verify the exact lug width and ensure the strap does not protrude beyond the edges of the 38mm case. Many artisanal straps from Casati Milano or similar European quality brands are specifically designed for this size and offer personalisation in leather, colours and stitching thread.

Durability depends on material, usage and maintenance. An alligator strap with vegetable tanning, worn daily, typically lasts 3-5 years before replacement, developing a noble patina over time. Italian box calf has similar longevity (3-4 years) under normal conditions. A NATO canvas strap lasts longer (5-7 years) thanks to canvas durability, while FKM rubber can reach 7-10 years. To extend lifespan, avoid prolonged exposure to excessive humidity, salt sweat without rinsing, and periodically apply leather conditioner (every 6-8 months for alligator).