L3.788.4.99.6Ref

The Longines HydroConquest L3.788.4.99.6, released in 2026 in the HydroConquest collection, follows the design direction introduced with the 2024 HydroConquest GMT. Its round 42mm stainless steel case includes a screw-in crown, unidirectional rotating bezel with black ceramic insert, 30 bar water resistance, and a scratch-resistant sapphire crystal with several layers of anti-reflective coating on both sides; the frosted blue sunray dial uses applied indexes (no Arabic numerals), silvered polished hands, and a date. The self-winding L888 calibre with monocrystalline silicon balance spring beats at 25,200 vibrations per hour, has a 72-hour power reserve, and drives the central hours, minutes, seconds, and date; it comes on a stainless steel Milanese mesh bracelet with a double security folding clasp and micro-adjustment.