Strap for Step One Chronograph Stainless Steel / Grey

The lug width of the L & Jr Step One S1503 is 20 millimetres. This dimension is essential for the compatibility of any aftermarket strap. Correct measurement is taken between the two attachment lugs, from inner wall to inner wall, to ensure a perfect fit.

For the S1503, we recommend straps in alligator or vegetable-tanned calf leather, which enhance the formal elegance of the brushed steel case. If you prefer technical versatility, choose a NATO strap in ballistic nylon or vulcanised rubber. The choice depends on your intended use and personal aesthetic preferences.

To change the strap, obtain a spring bar tool or a small flathead screwdriver. Apply gentle pressure to one of the two lugs to extract the anchor bar, remove the old strap, insert the bar into the new strap, and secure firmly to the lugs. Always verify that the new strap is 20mm wide before proceeding.

Absolutely. Aftermarket straps of 20 millimetres width are fully compatible with the S1503. Milano Straps offers a specialised range of artisanal straps in this size, made from leather, fabric, and rubber, with personalisation options available. Always verify the lug width before purchase.

A premium-quality leather strap typically lasts between 3 to 5 years with regular use and proper maintenance, extending to 7–10 years with exceptional leathers such as cordovan or alligator. Longevity depends on intensity of use, sun and humidity exposure, and regular cleaning and conditioning of the leather.