Strap for Spring Drive Chronograph Stainless Steel / Black / Bracelet

The lug width of the SBGC203 is 20 millimetres. This measurement, also called lug width, determines strap compatibility with the case. Measure it with a digital caliper by calculating the distance between the two case lugs (one upper and one lower). A strap with a different lug width will not fit properly and may slip during wear.

There is no single 'best' strap, but several choices depending on usage. For formal occasions, alligator with vegetable tanning is ideal due to its regular texture and evolving patina. White calf is the most versatile choice and allows rapid visible ageing. Shell cordovan is the luxury solution for those seeking a material destined to last decades with increasing beauty. Natural rubber or NATO are technical solutions for humid or sporty environments.

To change the strap, position the watch with the strap facing upwards. Using a spring bar removal tool, insert the flat end into the gap between the case and the strap lug. Push upward to compress the spring bar, then slide the bar out of its seat. Repeat on the other side. To install the new strap, align the two holes at the end of the new strap with the spring bars, compress slightly and slide the bars into their seats until they click audibly into position.

Yes, the SBGC203 is fully compatible with third-party straps of any material as long as the lug width is exactly 20 millimetres. This means you can use straps from specialist brands, artisanal leathers, innovative materials and custom designs. Compatibility is universal: the case lug is not proprietary. Simply ensure the strap is manufactured to the 20mm specification.

The lifespan of a leather strap depends on tanning quality, frequency of wear and environmental conditions. A high-quality alligator strap with vegetable tanning typically lasts between 5 and 8 years under regular use (worn 5 days a week). White calf, being less dense, wears more rapidly: between 3 and 5 years. Shell cordovan, thanks to its exceptional density, can exceed 10 years. Moisture and sun exposure accelerate ageing. A well-maintained strap, dried promptly and stored in dry environments, significantly extends its useful life.