Strap for Master Collection Calendar

The lug width of the Longines Master Collection L2.503.0.83.6 is 20 millimetres. This measurement refers to the distance between the lugs—the attachments on the case where the strap is fitted. All straps compatible with this specific measurement are guaranteed for perfect fit without play or forcing. To verify manually, measure with a calliper the distance between the two lugs where the strap sits on your case.

For the Master Collection L2.503.0.83.6, we recommend straps in alligator or vegetable-tanned calf leather as a priority. Alligator represents the most formal and versatile solution, with natural texture that delivers elegance without compromise. Vegetable-tanned calf develops authentic patina over time, telling the story of the watch's daily wear. For more relaxed daily use, shell cordovan or technical rubber offer functionality with refined aesthetics.

Strap replacement requires specific tools: a spring bar tool allows you to push the thin pin laterally that supports the strap in the case attachments. Position the tool on the pin ends, press gently to detension it, then slide out the worn strap and insert the new one. If you do not have these tools, we recommend contacting a specialised technical service to avoid damaging the case or the lugs.

Absolutely. All straps compatible with 20mm lug width are mountable on the L2.503.0.83.6 without technical issues. Compatibility is guaranteed by industrial standardisation of lug width. Simply ensure that the strap you choose is genuinely catalogued for 20mm lug width. Our handcrafted straps are constructed to this specification and often offer build quality superior to original straps.

The durability of a leather strap depends on usage and material choice. A strap in alligator or shell cordovan, with vegetable tanning and artisanal construction, typically lasts 3–5 years with regular wear. The leather adapts to your wrist, develops unique patina and tells the story of time passed. To extend useful life, we recommend rotating straps (owning at least 2–3) and avoiding prolonged exposure to very humid environments. Proper periodic maintenance with specific creams preserves leather elasticity and prevents cracking.