Longines HydroConquest L3.665 TPD & Winder Settings | Aevitas

The Longines HydroConquest L3.665 (L3.665) needs a specific daily rotation to stay on time: 800 turns per day, clockwise rotation only. Here is the exact programme to dial into your winder.

Recommended Winder Settings

Setting	Value
Turns per day (TPD)	800
Winding direction	clockwise
Movement

Recommended Winder

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Why These Settings Matter

Every automatic movement is designed to receive a certain amount of winding each day. Give the HydroConquest L3.665 its 800 turns and the mainspring stays in the middle of its power band, where timekeeping is most consistent. Drop well below that figure and the watch gradually runs down; the date and time then need resetting by hand.

There is no need to worry about going over the top: like all modern automatics, this movement has a slipping mainspring bridle that lets the barrel slip once it is fully wound, so extra turns cannot overwind or damage it. A higher setting simply means the winder cycles a little more often than strictly necessary.

Because all Aevitas winders offer settings from 650 to 1,850 TPD, you can programme exactly 800 TPD for this watch — and reprogramme in moments if you swap watches around.

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