Skip to content
Longines HydroConquest

Longines HydroConquest

QuartzSteel

Ref. L3.840.4.96.6

Collection: HydroConquestCase size: 44mmMovement: L157.3

The Longines HydroConquest, reference L3.840.4.96.6, is a dive watch with a 44 mm round case in steel. Applied Arabic numerals and indexes accompany polished silvered hands on the sunray blue dial. Measuring 11.9 mm thick and 54.7 mm lug-to-lug, the case has a water-resistance rating of 300 metres; the case has a screw-down crown. Power comes from quartz calibre L157.3, powered by a RENATA 371 battery. The dial is covered by a scratch-resistant sapphire crystal, with several layers of anti-reflective coating on the underside. The dial has a date display and central seconds. The case has a unidirectional rotating bezel. A steel bracelet fastens with a double safety folding clasp.

Add to my inventory

Free account required - pre-fills all specs automatically

Last updated 8 Oct 2026Suggest a correction

FOR WATCH DEALERS

Trading the Longines HydroConquest?

Clone any catalog watch into your stock, sync it to Chrono24 and eBay, and invoice it with your own tax settings.