Strap for Master Collection 29 Two Tone Rose / Bronze

The lug width of the Longines Master Collection L2.257.5.99.7 is 15mm. This measurement is specific to the lady's version of the collection and is determined by the perpendicular distance between the two horizontal lugs on the watch case. It is essential to verify this measurement before purchasing a compatible strap to ensure proper fitting.

For the L2.257.5.99.7, alligator, vegetable-tanned calf leather, or shell cordovan straps are recommended. Alligator provides a regular texture and excellent scratch resistance, ideal for formal occasions. Vegetable-tanned calf leather develops a natural patina over time and offers aesthetic warmth. Cordovan is the choice for those seeking maximum durability and minimal maintenance. Sports rubber straps are not recommended as they would compromise the classic identity of the timepiece.

To change the strap, use a spring bar tool specifically designed for 15mm lugs. Position the tool in the spring bar slot, apply gentle downward pressure to compress the internal spring, and carefully remove the old spring bar and strap. Repeat on the other lug. To install the new strap, insert the spring bar into the lug holes, aligning them correctly with the watch case lugs, then push the bar until it clicks into place. It is advisable to entrust this operation to a professional watchmaker if you lack experience.

Yes, quality aftermarket straps designed specifically for 15mm lug width are available. Milano Straps offers a complete range of compatible straps in various materials, finishes, and colours, customizable according to personal preferences. All aftermarket straps are mountable via spring bar tool and maintain full compatibility with the Longines case without altering the watch's construction characteristics.

The lifespan of a leather strap depends on the quality of the material and frequency of use. A quality artisanal alligator or cordovan strap can last 5–10 years with daily use and regular maintenance (periodic cleaning and conditioning). Vegetable-tanned calf leather has a similar lifespan but requires greater maintenance to preserve the patina. Prolonged exposure to humidity, direct sunlight, and extreme temperatures accelerates ageing. The standard warranty for personalised artisanal straps is 18 months.