Grand Seiko
Mechanical SBGH261— lug 20mm

The Grand Seiko SBGH261 features a lug width of 20 mm. This dimension is measured from the inner point of one lug to the other, and it is the determining factor for selecting any compatible aftermarket strap. It should not be confused with the case diameter (40 mm). All straps ordered on milanostraps.it in the 20 mm category will fit your watch perfectly.

For the SBGH261, we recommend first and foremost a superior quality alligator strap, particularly the belly cut, which echoes the noble texture of the dial. Alternatively, vegetable-tanned leather ensures authentic ageing and deep colourways. English calf leather of medium thickness (1.2–1.4 mm) offers versatility between formal and everyday contexts. For sporting occasions, a structured rubber strap in black or slate grey creates a fascinating contrast with the yellow gold.

Although the SBGH261 features a case with integrated lugs, the strap remains removable via the spring bars. You will use a dedicated tool – available in quality watchmaking boutiques – to gently compress the spring and extract the strap. On the other end, you will insert the new strap by hooking one side first, then the other, until the closing click is heard. If you prefer to avoid DIY work, Casati Milano can perform the change during an appointment consultation.

Absolutely yes. The 20 mm lug width is an established horology standard, used by dozens of brands in the sports and dress segments. Milano Straps straps, crafted for this width, fit without any mechanical adaptation. However, it is advisable to choose straps with thickness and construction that respect the elegant proportions of the SBGH261: avoid overly rigid materials or straps designed for sports watches, which would distort its refined aesthetic.

A high-quality natural leather strap, such as those vegetable-tanned or in alligator, typically lasts 3–5 years under normal conditions, with occasional cleaning and drying after moisture exposure. Shell cordovan, being particularly robust, can reach 6–7 years. Lifespan depends on usage: a daily-worn strap ages faster than an occasional one. Milano Straps offers an 18-month warranty on custom work from the Casati Milano atelier, covering manufacturing defects.