Grand Seiko · Mechanical

Strap for Evolution 9 Collection Stainless Steel / Black / Disney 100

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter40 mm
ReferenceSLGH025
FamilyMechanical
MovementGrand Seiko caliber 9SA5 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Mechanical SLGH025

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Mechanical SLGH025, seen from the bench

The Grand Seiko Mechanical SLGH025 embodies contemporary Japanese watchmaking philosophy, featuring a 40mm stainless steel case refined with the Zaratsu polishing technique. Powered by the Grand Seiko 9SA5 caliber operating at 36,000 semi-oscillations per hour, it delivers exceptional mechanical precision. With a 22mm lug width, water resistance to 100 meters, and a minimalist dial displaying hours, minutes, seconds, and date, this Mechanical Hi-Beat collection model combines technical rigor with versatile everyday wearability.

Frequently asked questions

What is the lug width of the Grand Seiko Mechanical SLGH025?

The lug width of the SLGH025 is 22mm. This measurement represents the distance between the two attachment pins of the strap. It is essential to verify this measurement before purchasing an aftermarket strap to ensure proper fit and optimal security when wearing the watch.

What is the best strap for the Grand Seiko SLGH025?

The choice depends on your intended use. For formal occasions, we recommend alligator in black or Tuscan calf leather with vegetable tanning in deep tones. For a more versatile approach, Tuscan calf Midnight Blue or cognac offers an elegant balance between formality and practicality. For sports use, vulcanised rubber guarantees durability and ease of maintenance.

How do I change the strap on my Grand Seiko Mechanical SLGH025?

To change the strap, you need to remove the pins holding the current strap. Using a spring bar tool, carefully extract the pins from their housings on the case. Next, insert the pins of the new strap into the same housings, ensuring they are positioned symmetrically. If you are not confident with this operation, we recommend contacting a professional watchmaker.

Can I use an aftermarket strap with my Grand Seiko SLGH025?

Yes, provided the strap is specifically dimensioned for 22mm lug width. Milano Straps offers a wide selection of compatible straps, made from premium materials such as alligator, Tuscan calf with vegetable tanning and shell cordovan. We recommend always verifying the lug width before purchase and assessing the build quality of the new strap.

How long does a leather strap last on the Grand Seiko SLGH025?

The durability depends on the material, usage and maintenance. A quality Tuscan calf or alligator with vegetable tanning, if worn daily and properly maintained, can last between 3 and 7 years. The natural ageing of the leather is desirable in this context: the patina that develops represents your personal narrative of the strap. Rubber and shell cordovan generally offer greater longevity.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only