Strap for Automatic Hi Beat 36000 GMT Stainless Steel / Silver / Strap

The Grand Seiko SBGM221 features a 20mm lug width, a standard dimension that provides access to an extensive range of artisanal straps. To verify compatibility, measure the internal space between the case lugs perpendicularly to the longitudinal diameter.

We recommend black or dark blue alligator to emphasise the sporting character of the Hi-Beat movement, or shell cordovan with natural patina for sophisticated elegance. For daily wear, vegetable-tanned leather with Italian tannage and medium grain offers durability and predictable ageing, ideal also with embroidered initials.

Use a standard spring bar removal tool: position it beneath the spring bar on the side without tension, apply gentle upward pressure, extract the bar, and repeat on the opposite side. Reverse the procedure to install the new strap, ensuring the bars are fully seated in the lugs.

Yes, any strap with 20mm lugs is mechanically compatible. Verify that the leather thickness (between 1.2 and 1.6mm) allows smooth passage of the spring bar without excessive compression, and that total length is calculated from full wrist to empty wrist, adding 1.5–2mm of play.

With moderate daily wear, an artisanal-quality leather strap lasts 3–5 years before replacement is needed. Vegetable-tanned leathers age uniformly, developing patina; alligator maintains structure longer; shell cordovan can exceed 7 years if protected from excessive moisture. Periodic maintenance—gentle cleanser, protection with natural wax—significantly extends durability.