Strap for Black Bay One 36 Stainless Steel / Blue / Bracelet

The Tudor Black Bay One 79640-0002 features a lug width of 19 millimetres. This specification is determined by the proportions of the 36-millimetre case and requires dedicated strap solutions, as 19mm is not a universal commercial sizing. Measurement is performed by inserting a flexible ruler perpendicularly between the two sides of the lug at the point of contact with the case.

For the 79640-0002 model, alligator straps with natural grain enhance the compact proportions of the case; vegetable-tanned calf leather develops an authentic patina over time; shell cordovan adds luminosity and chromatic depth. For daily informal use, a NATO strap in nylon or canvas maintains the sport character of the Black Bay. The choice depends on context of use and the prevailing destination of the watch.

The strap is replaced using a quality spring bar tool, keeping the watch horizontal on a soft surface. Locate the two transverse pins that run through the lugs; insert the slender tool into the lateral groove of the pin, pushing gently inward to release the spring and remove the strap. Reverse the procedure to fit the new strap, verifying that the pin is fully seated in both positions.

Yes, any strap manufactured for a 19-millimetre lug width is compatible with the Black Bay One 79640-0002. The essential requirement is verifying that the strap is genuinely dimensioned for 19mm and not slightly different sizes (18mm or 20mm). Milano Straps' bespoke leather straps conform to the case lug specifications of the model and can be adjusted in length according to wrist circumference.

A quality leather strap with vegetable tanning, used daily, has an estimated lifespan of 2 to 4 years before requiring replacement. Factors influencing longevity include exposure to moisture, perspiration, frequency of use, and care during maintenance (regular drying, avoiding prolonged soaking). Shell cordovan and alligator, when crafted artisanally, tend to deteriorate more slowly than standard calf, offering superior durability.