Strap for 1926 39 Stainless Steel / Black - Diamond

The lug width of the Tudor 1926 91550-0009 is precisely 21mm. This measurement represents the internal distance between the two metal lugs of the case. To verify correctly, place a ruler perpendicular to the watch at the midpoint of the case shoulder and read the distance between the inner edges of the lugs. A compatible strap must have exactly 21mm width.

The ideal strap depends on intended use. For formal classical wear, we recommend alligator with vegetable tanning in dark brown or European calf in black, creating aesthetic contrast with the stainless steel case. For robust daily wear, a grey anthracite cotton-nylon NATO or black FKM rubber strap with dual-click deployant. Ensuring 21mm lug width compatibility is the first selection criterion.

Strap replacement requires a spring bar tool. Position the watch on a soft, stable surface and gently compress the internal spring of the upper lug downward using the tool, releasing the pin. Repeat for the lower side. Remove the old strap and insert the new one, aligning the pin in the slots. If unfamiliar with the procedure, entrust this task to a professional to avoid damaging the case.

An aftermarket strap is compatible with the 91550-0009 if and only if it has an exact lug width of 21mm. Any strap manufactured to this specification – regardless of brand, material or colour – will fit perfectly. MilanoStraps offers a dedicated collection of handcrafted 21mm straps, compatible and customizable for this model.

The lifespan of a natural leather strap (alligator, calf, shell cordovan) depends on usage, tanning method, humidity and maintenance. With vegetable tanning and moderate use, artisanal quality resists 3-5 years before showing structural wear signs. Patina and colour variations are normal and desirable. Casati Milano guarantees 18 months on bespoke straps and recommends annual maintenance (cleaning, protective treatment).