Ref. L3.788.4.06.6 · Diver
HydroConquest collection · 15 watches
The market
The forum market
Browse forum listings and their asking prices. Market+ adds medians with their sample sizes and the weekly trend.
Longines on the secondhand market
+6.2%
2026 so far · +1.6% to +13.2% · 46 matched watches
In line with the index
Divers as a group: +6.5% · 338 matched watches
Year-by-year readings →The connection engine
The community take
The Longines HYDROCONQUEST (ref. L3.788.4.06.6) is an automatic diver watch, with a 42mm stainless steel case, 11.7mm thick, powered by the Longines L888 movement and a 72-hour power reserve. Water resistance is rated to 300m. Manufacturer MSRP is $2,200. The dial color is green.
On real wrists · 1
The paper trail
The discussion