Strap for HMS1

The lug width of the 1LCAP.W01A.C110A is 20 mm. This measurement represents the distance between the two case lugs and determines compatibility with aftermarket straps. To verify your watch's lug width, measure the space between the lugs at the 12 and 6 o'clock positions: the value must be exactly 20 mm.

For the 1LCAP.W01A.C110A in rose gold, we recommend either Cognac alligator or vegetable-tanned calf leather in dark brown: both materials harmonise beautifully with the warm tone of rose gold, emphasising the collection's British horological heritage. Alternatively, genuine shell cordovan in burgundy represents the most refined choice for formal occasions, developing a violet-copper patina over time that complements aged rose gold.

Changing the strap on the 1LCAP.W01A.C110A involves removing the spring bars positioned perpendicularly to the lugs. Using a dedicated spring bar tool, slide the tip under the bar, compress the internal spring slightly, and carefully lever until the bar disengages from one side. Repeat for the opposite end, then install the new strap by reversing the procedure. Ensure both bars are fully seated before wearing the watch.

Yes, any aftermarket strap with a 20 mm lug width is fully compatible with the 1LCAP.W01A.C110A. Simply verify that the width of the buckle or deployante clasp is proportionate to the lug width: for alligator or calf leather, we recommend stainless steel or rose gold annealed buckles to maintain stylistic coherence. NATO straps require no additional hardware, threading directly through the lug holes.

The lifespan of a natural leather strap on a luxury watch such as the 1LCAP.W01A.C110A depends on the tanning method, climate, and frequency of use. Alligator or vegetable-tanned calf typically lasts 3-5 years with moderate daily wear. Shell cordovan, thanks to superior fibre density, can last 7-10 years. Longevity increases significantly if the strap is alternated with other models. Periodic maintenance—gentle cleaning and natural conditioning—extends useful life and enhances organic patina development.