Strap for Heritage 1918

The lug width of the Longines Heritage L2.809.4.23.0 is 20 millimetres. This measurement is calibrated specifically for the proportions of the 41-millimetre case and is the decisive parameter for selecting a compatible strap. Always verify that the strap is manufactured precisely at 20 mm, as even minor variations (19 or 21 mm) compromise the fit to the lugs and the stability of the watch on the wrist.

For the Longines Heritage L2.809.4.23.0, we recommend in order of priority: alligator (chocolate brown or black) for formal transitions; vegetable-tanned calf (tobacco, tan, navy blue) for daily versatility; vulcanised rubber or NATO canvas (khaki, black, olive) for sports authenticity. Your choice depends on intended use and personal context. All straps must be supplied in 20 mm version with standard spring bar attachments.

The change requires just a few minutes. Use a spring bar tool or a thin flat screwdriver to extract the spring bar from the lug sockets. Work from one side of the case at a time, applying gentle leverage. Once both ends of the bar are freed, the old strap slides away. Insert the new strap by aligning the holes with the spring bar, then reinsert the bar into the sockets with a smooth movement. Verify that the attachments adhere perfectly to the lugs.

Any strap in 20 mm version with standard spring bar attachments is compatible with the Longines Heritage L2.809.4.23.0. On milanostraps.it you will find a selection of handcrafted 20 mm straps made in Italy, customisable in leather, colour, size and details. Straps are tested for fit and compatibility before dispatch.

The lifespan of a leather strap depends on the tanning method, usage and maintenance. A quality alligator strap lasts 5 to 8 years with regular use; a vegetable-tanned calf strap 3 to 5 years. Durability increases significantly if the strap is not exposed to constant humidity, abundant perspiration or prolonged direct sunlight. Minimal maintenance (occasional cleaning with a soft cloth, periodic rest) extends useful life. Artisanal straps from Casati Milano include an 18-month guarantee and are regenerable (lining replacement) to extend lifespan.