Technical Archive

Longines
Lyre L4.360.1.12.7— lug 13mm

Longines Lyre L4.360.1.12.7: 13mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Artisanal Note

"This model requires a precise 13mm lug width to preserve the original sartorial balance."

Lug Width

13 mm

The essential strap measurement.

Browse 13mm straps →

Reference

L4.360.1.12.7

Movement

Longines caliber L592.2 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Longines Lyre reference L4.360.1.12.7 is equipped with the L592.2 caliber with hour, minute, second and date functions, certified as a chronometer. The watch features 13mm lugs and belongs to the Lyre collection of the Swiss brand. The movement guarantees chronometric precision according to official standards.

FAQ

What is the lug width of the Longines Lyre L4.360.1.12.7?

The Longines Lyre L4.360.1.12.7 features a lug width of 13 millimetres (13mm). This non-standard dimension is characteristic of classic women's watchmaking from the 1960s and must be verified with callipers before ordering a strap, as most commercial offerings present 16mm, 18mm, or 20mm widths.

Which strap is best suited to the Longines Lyre L4.360.1.12.7?

For the L4.360.1.12.7, we recommend a vegetable-tanned alligator strap in 3.5–3.8mm thickness, or oil-finished calf leather in cognac or antique brown tones. These materials emphasise the discreet elegance of the 25mm case and permit natural patina development over time. Avoid NATO, data-link, or fabric straps that compete chromatically with the compact proportions of the timepiece.

How do I change the strap on a Longines Lyre L4.360.1.12.7?

The strap is replaced by extracting the spring bars from the lugs using a dedicated spring bar tool. Position the tool in the lateral hole of the bar and press inward to release the end, then repeat on the opposite side. Do not apply excessive force to prevent damage to the case. If unfamiliar with the procedure, consult a specialist watchmaker.

Can I fit an aftermarket strap to this Longines?

Yes, it is possible to fit quality aftermarket straps provided the lug width is exactly 13mm. Verify that the maximum thickness does not exceed 4.2mm to avoid compromising the lug geometry. We recommend artisanal straps from producers specialising in historic dimensions rather than universal straps of uncertain calibration.

How long does a leather strap last on a Longines Lyre?

A quality artisanal alligator or calf leather strap lasts between 7 and 15 years of daily wear, depending on tanning method, thickness, and maintenance. Vegetable tanning ages naturally, developing rich patina. Prolonged direct sunlight exposure, acidic perspiration, and extreme humidity accelerate deterioration. Gentle monthly cleaning with a dry cloth and reconditioning every 4–5 years substantially extends durability.