
The Longines HYDROCONQUEST (ref. L3.780.3.78.6) is an automatic diver watch, with a 39mm stainless steel case, 12.2mm thick, powered by the L888.5 movement. Water resistance is rated to 300m, under a sapphire crystal. Manufacturer MSRP is $2,350. The dial color is grey.
Owners widely praise the Longines HydroConquest's dial and finishing, with one owner finding it superior to a Rolex Submariner. The movement is noted as well-regulated, losing about 2 seconds per day. The watch is considered a versatile everyday or business-casual option, offering good value. However, owners criticize the bracelet for lacking tool-less micro-adjustment and describe winding the crown as a nuisance. Some in the line report tiny GMT markers that are difficult to read and the absence of a quick date adjust feature. Overall, owners rate the Longines HydroConquest highly for its finishing and value.