How water-resistant is it?

It is water-resistant to 30 bar. The Longines instruction manual equates 30 bar to 300 m of overpressure under its stated ISO 22810 test standard. Before immersion, make sure the screw-in crown is firmly secured. After sea water exposure, rinse the watch in fresh water; Longines also recommends an annual water-resistance check by an approved Longines Service Centre.

How long is the power reserve?

The self-winding mechanical movement provides a power reserve of up to 72 hours when fully wound, allowing it to continue running for approximately three days. The movement operates at 25,200 vibrations per hour and uses a monocrystalline silicon balance-spring.

How does the internal diving bezel work?

The internal turning diving flange provides a protected timing scale for tracking dive time. Its location inside the case helps guard against accidental movement and impacts that could change the setting. The distinctive two-crown configuration is part of the collection's heritage dive-watch design.

Is the dial easy to read?

The green lacquered polished dial uses Swiss Super-LumiNova for luminous visibility. A scratch-resistant sapphire crystal with several layers of anti-reflective coating on both sides improves durability and helps reduce reflections.

What warranty coverage is included?

Longines provides a five-year international warranty for mechanical watches purchased from January 1, 2021. It covers material and manufacturing defects existing at delivery when the warranty certificate is dated and fully completed by an official Longines dealer. The rubber strap has a 24-month international warranty against material or manufacturing defects. Normal wear, improper use, accidental damage, and unauthorized service are excluded.

800-860-3577

Longines Legend Diver Watch 39mm with Green Dial - L37644069

Name: Longines Legend Diver Watch 39mm with Green Dial - L37644069
Brand: Longines
SKU: L37644069
Price: 3500.00 USD
Availability: PreOrder

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Longines L37644069 Legend Diver Watch 39mm with Green Dial

Longines traces its dive-watch story through a 1937 chronograph with water-resistant pushers, patented in 1938, and its first dive watch in 1958. One year later, the brand developed an underwater-exploration watch with a Super-Compressor case, internal rotating bezel and two screw-in crowns - the design language now associated with the Longines Legend Diver. That heritage gives this watch a timeless presence while keeping the purposeful character of an instrument created for life both on land and underwater.

The distinctive two-crown layout works with an internal turning diving flange to support dive-time tracking. Placing the scale within the case helps defend its setting against unintentional movement and shocks, while preserving the clean, recognizable profile that has made the collection an icon since 1959. For this green edition, a stainless steel case surrounds a lacquered polished dial illuminated with Swiss Super-LumiNova, and a matching rubber strap with a buckle reinforces its water-oriented character.

Beneath the scratch-resistant sapphire crystal, several layers of anti-reflective coating on both sides promote a clear view of the dial. The self-winding mechanical movement operates from wrist motion at 25,200 vibrations per hour, while its monocrystalline silicon balance-spring supports stable mechanical performance. A power reserve of up to 72 hours can keep the watch running for approximately three days when fully wound. Together with a screw-in crown and water resistance to 30 bar, these details make the Longines Legend Diver a compelling mechanical dive watch for everyday wear and water activities.

Features

1959 Heritage
Connects everyday wear to the collection's enduring underwater-exploration identity.
Two-Crown Profile
Creates the unmistakable silhouette that distinguishes the Legend Diver.
Internal Turning Diving Flange
Places dive-time tracking within the case for added protection against accidental adjustment.
Screw-In Crown
Supports water resistance when returned firmly to its normal position.
30 Bar Water Resistance
Prepares the watch for substantial water exposure when its crown is secured.
Sapphire Crystal
Combines scratch resistance with multiple anti-reflective layers on both surfaces.
Automatic Movement
Self-winding mechanics operate at a published frequency of 25,200 vibrations per hour.
Silicon Balance-Spring
A monocrystalline construction promotes stable mechanical performance.
Up To 72-Hour Power Reserve
Provides approximately three days of operation when fully wound.
Green Luminous Dial
Pairs a polished lacquered finish with Swiss Super-LumiNova visibility.
Green Rubber Strap
Completes the water-oriented design with a conventional buckle closure.