Strap for Master Collection Date 25.5 Stainless Steel - Yellow Gold / Champagne / Bracelet

The lug width of the Longines Master Collection L2.128.5.37.7 is 13mm (13.0mm), measured from inner lug to inner lug. This width is specific to vintage and elegant Longines models of medium size. To verify compatibility, use a digital calliper: the value must be 13.0 ± 0.2mm.

Vegetable-tanned alligator is the purist choice: its uniform grain texture amplifies the minimalist elegance of the case. For a sportier profile, Baracoa calf with deployante buckle offers fluidity. Shell cordovan in saturated colours (burgundy, black) imparts visual tension to the yellow gold-steel bicolour. For summer, off-white calf with black stitching creates geometric contrast.

The strap is changed via the spring bars that pass through the case lugs. Use a spring bar tool to compress the bar and extract it from its seat, then align the new strap and insert the pin. Avoid forcing to prevent lug damage. Milano Straps provides visual guides for this operation.

Yes, the L2.128.5.37.7 accepts 13mm aftermarket straps provided they are manufactured to specification for this lug width. Most commercial straps start at 14mm, causing unwanted side play. Milano Straps offers a curated selection dedicated to this lug width with guaranteed millimetre-perfect fit.

A quality vegetable-tanned leather strap lasts 3 to 7 years depending on usage, climate and maintenance. Vegetable leather develops patina over time and can be rejuvenated through cleaning and conditioning. Shell cordovan lasts longer (7-10 years), while calf requires greater humidity protection. Milano Straps offers an 18-month warranty on all handcrafted straps.