The watch is powered by the L157.3 caliber, a reliable quartz movement powered by a RENATA 371 battery (SR920SW – 1.55V). The integrated circuit includes the special E.O.L. function, a safety feature that provides early warning of the battery’s approaching end of life. This integrated module manages the display of hours, minutes, and seconds, as well as the date update.

The dial features a matte, sandblasted black finish—a high-contrast design against which the applied hour markers and polished silver hands stand out. Visibility in all lighting conditions is ensured by the Swiss Super-LumiNova® coating, which guarantees excellent luminescence at night or while diving.

The round stainless steel case has a diameter of 42.00 mm, a thickness of 11.30 mm, and a lug-to-lug width of 51.20 mm. Equipped with a screw-down crown, a screw-down case back, and a unidirectional rotating bezel, the watch is certified to withstand water pressure up to 30 bar. The dial is protected by a scratch-resistant sapphire crystal with a multi-layer anti-reflective coating on both sides.

The stainless steel bracelet has a lug width of 21 mm and fastens around the wrist with a double-security folding clasp equipped with a push-button release mechanism.

The watch weighs a total of 162.0 g.

Accompanied by packaging and official Longines 2-year warranty.