Strap for Black Bay 31 S&G / Anthracite - Diamond / Bracelet

The Tudor Black Bay One 79603-0003 features a 16-millimetre lug width. This measurement is essential for selecting a compatible strap. To verify it accurately, measure the distance between the two lugs using a calliper, measuring from the inner edge of one lug to the inner edge of the other. Precise measurement is critical to ensure correct installation and avoid play or damage during fitting.

For the Black Bay One 79603-0003, we recommend primarily an alligator strap dyed in deep black or burgundy, which dialogues beautifully with the two-tone gold and steel case. An equally sophisticated alternative is vegetable-tanned calf leather, which develops a natural patina over time. For those seeking versatility, shell cordovan offers durability and elegance, whilst an FKM rubber strap represents the contemporary choice for daily sporting use.

To change the strap on your Black Bay One 79603-0003, obtain a dedicated spring bar removal tool. Position the watch securely, locate the lateral spring bars securing the strap to the case lugs, and use the tool to compress them inwards, facilitating strap extraction. Once removed, insert the new strap by aligning the holes with the pins and allow the spring bar mechanism to reset naturally. The operation requires patience and care to avoid scratching the case.

Yes, any strap with a 16-millimetre lug width is compatible with the Black Bay One M79603-0003. Milano Straps offers a curated selection of 16mm straps in various leathers and finishes, ready to ship and customisable according to your preferences (sizing, initials, thread colour). The Casati Milano atelier also creates bespoke straps with personalised consultation and an 18-month warranty.

The lifespan of a leather strap depends on the tanning method, intensity of use, and maintenance. An alligator strap, if treated with moderate care, maintains structural integrity for 3-5 years of regular use. Vegetable-tanned calf leather offers similar longevity, with the advantage that the patina developing over time increases its appeal. Shell cordovan, more resistant to wear, can maintain functional properties for 5-7 years. Periodic maintenance (gentle cleaning, conditioning with specialised products) significantly extends the functional life of any leather strap.