Strap for Heritage Black Bay Chronograph S&G / Black / Bund

The lug width of the Tudor Black Bay Chronograph 79363N-0002 is 22 millimetres. This width specification defines the attachment points on the case and determines strap compatibility. To verify the measurement accurately, use a calliper to measure the internal distance between the two lugs: the result will be approximately 20 millimetres, which means the strap must have a width of 22 millimetres to fit perfectly without lateral play or excessive tightness.

The optimal strap choice depends on usage and aesthetic preference. For elegance and natural patina development, we recommend vegetable-tanned alligator in honey or cognac tones, which complements the yellow gold case. For a robust, sporty character, English leather in dark brown or tobacco amplifies the racing heritage. For aquatic and casual contexts, a black nylon NATO in double-layer construction preserves the motorsport vocation. All straps must be 22 millimetres wide to ensure perfect compatibility with the case lugs.

Changing the strap on the 79363N-0002 requires a precision spring bar tool. Position the watch on a soft surface (cloth or mousepad), then use the spring bar tool to compress the spring of the lower lug attachment. Once released, the lug slides out smoothly. Repeat for the upper lug. Insert the new 22-millimetre strap in the same manner, ensuring the spring bars click into position with an audible snap. Verify that the strap is perfectly aligned and symmetrical. If inexperienced, consult a qualified watchmaker to avoid scratching the case.

Quality aftermarket straps (such as those from Milano Straps) offer material and finish variety unavailable in standard Tudor straps, whilst maintaining perfect constructive compatibility with the 22-millimetre lug width. Original Tudor straps are typically rubber or chrome-tanned leather, whereas specialised aftermarket producers offer vegetable-tanned alligator, aged English leather, and military-grade NATO canvas. Compatibility is guaranteed by width specification: all 22mm straps, original and aftermarket, adapt to the 79363N-0002 lugs without issue. The difference lies in construction quality, patina development capacity, and customisation options.

The lifespan of a leather strap for the 79363N-0002 depends on material type, frequency of use, and maintenance. A vegetable-tanned alligator strap, worn daily, typically lasts 3-5 years before functional replacement becomes necessary, though the developed patina enhances its aesthetic appeal. Quality English leather offers 4-6 years of durability, with progressive patina development. Wear factors include moisture exposure, perspiration, prolonged sun exposure, and lack of protective wax treatment. To extend strap life, we recommend monthly cleaning with a damp cloth and natural wax application every six months. Milano Straps guarantees 18 months on custom strap invoices.