Longines HYDROCONQUEST
Ref. L3.780.3.78.6 · Diver
$2,350Stock unknown
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Case
- Diameter
- 39mm
- Thickness
- 12.2mm
- Lug-to-lug
- 48.1mm
- Lug width
- 19mm
- Material
- Stainless Steel
- Water resistance
- 300m
Crystal & dial
- Crystal
- Sapphire
- Dial colour
- Grey
Movement
- Caliber
- Longines L888
- Type
- Automatic
Design language
- Case shape
- round
- Dial style
- matte
- Bezel
- rotating
- Bracelet
- lug-attached
- Hands
- baton
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The living market
Asking prices & sales
Tracked on the secondary market, updated through the day. Not appraisals or offers.
Retail$2,350
No confirmed active listings.
History only · Watch family · 17 weeks, Dec 2, 2019–Jan 12, 2026 · 10 recent or historical posts
- The weekly trend, on a real time scale
Longines on the secondhand market
+11.4%
2026 so far · +4.8% to +19.0% · 42 matched watches
In line with the index
Divers as a group: +7.4% · 297 matched watches
Year-by-year readings →The connection engine
More like this.
The community take
Owners talk.
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.
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