Strap for Style 34 Stainless Steel / Fluted / Black-Diamond / Strap

The lug width of the Tudor Style 12310-0025 is 20 millimetres. This width was selected by Tudor to maintain harmonious proportions on the 34-millimetre case. You can verify this measurement by removing the spring bar and measuring the distance between the two attachment holes: you will obtain a value between 19.8 and 20.2 millimetres.

For this 34-millimetre dress watch, we recommend straps in alligator, shell cordovan or vegetable-tanned calf leather. On a white dial, choose cognac brown, grey or black. On a black dial, favour lighter tones such as cream or light brown. Avoid excessively thick straps: a dress watch requires elegant proportions.

Position the watch on a soft surface with the case facing upward. Locate the two spring bars (small metal rods) on either side of the case, beneath the lugs. Using a spring bar tool or a rounded end, press towards the centre of the case to release the internal spring and slide outward. This movement will allow the strap to come off. Repeat for the second side. To insert the new strap, align the holes to the lug ends and press gently until you feel the locking click.

Yes, any strap with a 20-millimetre lug width is perfectly compatible. The 20mm specification is standard for bespoke handmade straps. Always verify that the strap has been cut to the correct length for your wrist: typically the lower section (right) should measure 110-120 millimetres, the upper section 70-80 millimetres.

A bespoke leather strap in premium materials (alligator, cordovan, vegetable-tanned calf) lasts on average 3-5 years with moderate daily wear. Durability depends on environmental conditions: excessive humidity, constant contact with sweat or water can reduce the service life. A leather strap develops a natural patina that increases its appeal over time, until signs of wear require replacement. Store the strap in a dry environment and apply a protective treatment with natural oils every six months.