Strap for Saint-Imier Date 30 Two Tone

The lug width (or lug size) of the Longines Saint Imier L2.563.5.59.7 is 15mm. This measurement represents the distance between the spring bar holes on the watch case and is essential for selecting compatible straps. Measure the lug width using a digital calliper positioned perpendicular between the inner centre of each lug, ensuring you exclude standard 16mm straps.

For the L2.563.5.59.7, alligator leather with tight grain (dark brown or black), vegetable-tanned calf with natural patina, or shell cordovan (for collectors seeking rarity) are recommended. These materials harmonise with the vintage and refined character of the timepiece. Avoid laminated rubber and saturated colours. Selection depends on intended use: alligator for formal occasions, calf for versatility, shell cordovan for exclusivity.

To change the strap on the L2.563.5.59.7, you must extract the spring bars from the case using a springbar tool. Insert the tool's tip into the lateral slot of each spring bar; the bar retracts, allowing removal of the old strap. Align the new strap's holes with the lugs and press the spring bar home until it clicks into place. If inexperienced, consult a professional watchmaker to prevent case damage.

Yes, Milano Straps offers a collection of artisanal 15mm straps compatible with the L2.563.5.59.7. These are customisable in length, colour, initials, and stitching style, ensuring precise fit. Various materials are available (alligator, vegetable-tanned calf, NATO), and bespoke deployante clasps can be commissioned through the Casati Milano atelier.

Leather strap longevity depends on material quality, tanning method, and frequency of wear. A quality alligator strap typically lasts 5–8 years with daily use; vegetable-tanned calf, being softer, has a shorter lifespan (3–5 years) but develops an appealing patina. Shell cordovan exceeds 10 years thanks to superior density. Milano Straps warrants all bespoke straps for 18 months and offers maintenance and stitching replacement services.