Strap for Sistem Tux

The lug width of the Swatch Sistem 51 YIS405G is 20mm. This dimension, measured between the two case terminals, determines compatibility with any aftermarket strap. It is essential to verify this measurement before purchasing a replacement strap, as even minor variations prevent proper mounting.

It depends on usage and aesthetic preference. For an elegant look, we recommend a vegetable-tanned leather strap in cognac or an alligator in black—these noble materials create a fascinating contrast with the exposed mechanics of the dial. For those seeking practicality and durability, a NATO strap in heavy canvas or an FKM rubber strap are excellent choices, maintaining the high-tech character of the model. The colour should complement the dial: dark blue for black dials, beige for white dials.

The Sistem51 YIS405G features an integrated factory bracelet, but accepts alternative straps through standard 20mm lugs. Use a spring bar tool or specific strap tool to gently push the pin from the case terminals. Insert the new strap ensuring the lug is perfectly centred in both holes. Reseal the pin with the same spring bar tool. This requires no special skills, but care should be taken not to scratch the case.

Absolutely. Thanks to the standard 20mm lug width, the YIS405G is compatible with the vast majority of aftermarket straps on the market. You can choose from leather, NATO, rubber, and even metal straps with deployante clasp. The important thing is to verify that the strap dimension is exactly 20mm on opposite sides.

A quality leather strap (vegetable-tanned, alligator, shell cordovan) mounted on a Swatch Sistem51 YIS405G lasts an average of 3-5 years with moderate daily use. Longevity depends on frequency of use, exposure to moisture, and care. Vegetable-tanned leather straps develop a beautiful patina over time. To extend lifespan, avoid prolonged water immersion and occasionally apply a leather-specific conditioner. Rubber or NATO straps last up to 7-10 years.