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Grand Seiko · Mechanical

Strap for Automatic Hi Beat 36000 Stainless Steel / Black / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Grand Seiko
Lug width20 mm
Case diameter40 mm
ReferenceSBGH205
FamilyMechanical
MovementGrand Seiko caliber 9S85 hours, minutes, seconds | date
Year2017
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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Straps for the Mechanical SBGH205

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Mechanical SBGH205, seen from the bench

The Grand Seiko Mechanical SBGH205 "Autumn" features a 40.20mm stainless steel case with a textured dial evoking autumn colours, paired with 20mm lugs. The calibre 9S85 operates at 28,800 vibrations per hour (4 Hz), displaying hours, minutes, seconds and date. Hand-finished movement components visible through the caseback exemplify Grand Seiko's precision engineering and zero-defect philosophy.

Frequently asked questions

What is the lug width of the Grand Seiko Mechanical SBGH205?

The Grand Seiko SBGH205 features 20mm lugs. This width was selected by Grand Seiko to maintain optimal proportions between the 40.20mm case diameter and the strap, ensuring elegant drape and a stable base for thicker straps.

Which strap pairs best with the Grand Seiko SBGH205?

Dark brown alligator (mink or chocolate) is the most refined choice, emphasising the autumnal tones of the textured dial. Black shell cordovan or burgundy vegetable-tanned leather offer sophisticated alternatives. For tactical versatility, NATO straps in neutral tones (beige, sage grey) allow style transitions without compromise.

How do I change the strap on a Grand Seiko SBGH205?

Use a spring bar tool to compress the small metal pins (spring bars) securing the strap to the case. Position the tool in the lateral slots of the lug, compress to disengage the internal spring, and slide the strap away. Repeat on the opposite side. For installation, align the lugs with the terminals and ensure the spring bars fully engage.

Can I fit an aftermarket strap on a Grand Seiko SBGH205?

Yes, absolutely. Any strap with a 20mm lug width is compatible. We recommend high-quality straps (alligator, shell cordovan, vegetable leather) to respect the craftsmanship of the 9S85 movement and the Zaratsu finish of the case. Milano Straps are hand-crafted for durability and moisture absorption.

How long does a natural leather strap last on a Grand Seiko?

A natural leather strap (alligator, shell cordovan, or vegetable leather) lasts 4–6 years with moderate daily wear, provided proper maintenance. Vegetable leather patinas uniformly, developing character over time. Accidental drops, prolonged contact with chlorinated water, and excessive humidity reduce longevity. Milano Straps provides an 18-month warranty on all hand-crafted straps.

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.

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