Strap for Master Collection Chronograph 40 Stainless Steel / Black - Roman / Strap

The Longines Master Collection L2.629.4.51.7 features a lug width of 20 mm. This measurement is taken from the base of one lug to the other, and it is the reference standard for selecting compatible straps. The 20 mm size is one of the most common among elegant chronographs, offering a wide variety of materials and finishes in the aftermarket segment.

For the Master Collection L2.629.4.51.7, alligator leather represents the most refined choice, ideal for formal contexts and those who appreciate a patina that evolves over time. Alternatively, calf leather subjected to vegetable tanning offers an excellent balance between softness and durability, whilst shell cordovan is perfect for those seeking a glossy surface that develops a mirror-like patina. For semi-sporting use, a vulcanised rubber strap maintains the case elegance whilst transforming the watch into a more versatile instrument.

To change the strap, you will need a spring bar tool. Position the watch with the lugs facing downward, insert the tool blade into the lateral groove of the lug, gently push inward to disengage the internal spring, then remove the lug. Repeat the operation on the other lug. To fit the new strap, reverse the procedure. If you lack experience, it is recommended to consult a professional.

Yes, absolutely. The Master Collection L2.629.4.51.7 with a 20 mm lug width is compatible with any aftermarket strap of the same width. It is important to verify that the strap's lugs are correctly dimensioned for the case lugs (inner diameter of the lug compatible with the lug attachment point). Milanostraps offers a wide selection of 20 mm compatible straps, customisable in size, initials and stitching thread colour.

The lifespan of a leather strap depends on material quality, frequency of use and storage conditions. A high-quality alligator strap can last 5-8 years with regular use, whilst good-quality calf typically lasts 3-5 years. Shell cordovan, thanks to its density, can last up to 10 years. Leather dislikes prolonged moisture and direct sunlight, so storing the watch away from the elements when not worn extends its life. Milanostraps supplies straps with an 18-month warranty and maintenance support.