Strap for Master Collection 40 Chronograph Calendar Stainless Steel / Blue / Bracelet

The lug width of the Longines Master Collection L2.673.4.92.6 is 21mm, measured as the internal distance between the case lugs. This dimension is precise and does not allow variations: a 20mm or 22mm strap would not fit properly. Use a digital calliper positioned on the internal lugs to verify the measurement.

An alligator strap with tight grain is the ideal choice, respecting the formal elegance of the watch. For daily use, vegetable-tanned calfskin offers longevity and natural patina development over time. A vulcanised rubber sports strap is the most practical option for marine or outdoor environments. A fabric NATO with deployante clasp remains the conservative and versatile choice.

Use a spring bar removal tool on a flat surface. First, remove the lower spring bar by gently pushing upward, then extract the strap. Align the new strap with the lug holes and reinsert the spring bar, ensuring it is securely fastened. Avoid forcing to prevent damage to the lugs.

Yes, the L2.673.4.92.6 is compatible with any quality 21mm strap, including artisan leather options. We recommend choosing straps from specialised suppliers to ensure correct application and durability. Customisable straps allow you to select leather type, colour, and stitching thread.

A quality leather strap, with regular maintenance, typically lasts 3–5 years with daily wear. Vegetable-tanned leather develops natural patina and may last longer. Factors such as humidity, sun exposure, and frequency of use affect longevity. Store the strap in a dry place and clean it periodically with a soft cloth.