Strap for Master Collection 38.5mm Power Reserve Stainless Steel / Black-Roman / Bracelet

The lug width of the Longines Master Collection L2.708.4.51.6 is 20 millimetres. This is the standard distance between the case lugs where the strap attaches. To verify, measure with a digital calliper the space between the two pins or observe the original strap. Any 20mm compatible strap will insert without forcing.

For the Master Collection L2.708.4.51.6 we recommend alligator with vegetable tanning in dark brown or burgundy tones, which amplifies the case's sobriety whilst maintaining discreet elegance. Alternatively, vegetable-tanned calf in taupe grey for those who appreciate visible patina over time. Shell cordovan represents the heirloom choice for exceptional durability and natural patina. All materials are available in 20mm from milanostraps.it.

Strap replacement is a straightforward manual operation: remove the watch from your wrist, position the lug laterally, insert a toothpick or dedicated tool into the small hole of the pin guide, push gently inward until the pin exits the opposite side. Repeat for the second pin. Align the new strap with the lugs and reinsert the pins from top to bottom until they click into place. No special tools are required.

Yes, any strap in 20mm lug width from a certified manufacturer (such as the artisanal models by Casati Milano or those available on milanostraps.it) is fully compatible. The pins are international standard. We recommend checking the strap thickness: between 3 and 4 millimetres is the ideal range to avoid play or forcing at the case lugs.

Durability depends on material and usage. An alligator or vegetable-tanned calf strap lasts between 3 and 5 years with daily wear, developing handsome patina over time. Shell cordovan exceeds 7–10 years thanks to fibre density. A leather strap is not a disposable consumable: Casati Milano guarantees 18 months and offers reconditioning services. Direct sunlight exposure, salt water and aggressive cleaners shorten lifespan; leather thrives in dry air and gentle cleaning.