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

The lug width of the Tudor Classic 21013-0007 is 20 mm. This dimension, now uncommon, was standard on 1970s watches and is perfectly proportioned to the 38 mm case diameter. To verify it, measure the distance between the two lugs (the metal fixing elements) using a digital calliper.

For a two-tone case (stainless steel and yellow gold) like the 21013-0007, black or cognac alligator is the most balanced choice: its parallel-grain texture engages elegantly with the metals without overwhelming them. Alternatively, vegetable-tanned calf offers natural patina that ages beautifully, whilst a grey canvas NATO reinterprets the model in contemporary key.

To change the strap, use a spring bar tool (two-pronged implement): insert the tip into the lateral hole of the lug and gently lift the internal spring of the pin until the strap is freed. Repeat on the other side. The new strap must have 20 mm lugs: insert the spring bar (pin) from one side only, thread the strap, then lock the pin on the other side, verifying firm engagement.

Yes, any strap with a 20 mm lug width is compatible. Check that the spring bars (the part in fabric or leather that wraps around the lug) have a tight tolerance (±0.5 mm): if too wide, the strap will slide; if too tight, you risk tearing during removal. A bespoke strap ensures perfect fit.

A high-quality leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with daily wear. Longevity depends on tanning method, frequency of use and exposure to moisture, perspiration and sunlight. A vegetable-tanned strap, if regularly conditioned with specialist balms, can endure longer and develop a fascinating patina. Stitching, if executed with quality thread, remains intact even after years of wear.