The Basics

The Longines GrandeVitesse Chronograph GMT has a stainless steel case of 44mm, fitted with an aluminum tachymeter bezel calibrated for both KM/H and MPH. This watch is powered by caliber L686, which is Longines’ version of the ETA / Valjoux 7754.

Brand: Longines
Family: GrandeVitesse
Reference: L3.637.4.70.6 (aka: L36374706)
Name: GrandeVitesse Chronograph 24h
Produced: 2009 – 2011
Limited: No

Below is a detailed look at Longines’s model L3.637.4.70.6 from GrandeVitesse watch family, including the price, case details and movement features.

Longines GrandeVitesse L3.637.4.70.6

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The Details

Longines’s GrandeVitesse Chronograph 24h (L3.637.4.70.6 (aka: L36374706)) was originally released in 2009 – 2011. This watch features a automatic movement beating at a frequency of 28800 bph ( 4 Hz) to provide a 42-hour power reserve when fully wound.

The Case

The stainless steel case measures 44mm in diameter and roughly mm thick, with 22mm lug width. The round case is paired with a silver color dial with stick-shaped hands, and a stick / dot hour markers and minute track, covered by a sapphire glass. Longines’s GrandeVitesse model L3.637.4.70.6 is water resistant up to 50 meters (164 ft). A display caseback is over the back of the watch case.

Material: Stainless steel
Glass: Sapphire
Back: Display
Shape: Round
Diameter: 44mm
Height: mm
Lug Width: 22mm
W/R: 50

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The GrandeVitesse L3.637.4.70.6 movement is a powered by caliber L686 made by Longines. The 25-jewel automatic movement is 30mm in diameter. Its balance wheel oscillates at 28,800 semi-oscillations per hour or 4 Hz. This movement offers a 42-hour power reserve.

Type: Automatic
Brand: Longines
Caliber: L686
Base: ETA 7754
Display: Analog
Diameter: 30mm
Jewels: 25
Reserve: 42 hours
Frequency: 28800 bph
Time: Additional 24 Hour Hand (adjustable), Hours, Minutes, Small Seconds
Chronograph: Chronograph
Additionals:

The Price

How much does the Longines’s GrandeVitesse L3.637.4.70.6 cost? This watch was introduced in 2009 and has been in Longines’s collection for around . This watch is not a limited release. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: $2,270

For more information, visit Longines online.

Specifications:

  • Brand: Longines
  • Model: GrandeVitesse Chronograph 24h
  • Reference Number: L3.637.4.70.6 (aka: L36374706)
  • Limited: No

Case & Dial:

  • Material: Stainless steel
  • Glass: Sapphire
  • Back: Display
  • Diameter: 44
  • Thickness:
  • Lug Width: 22
  • Dial Color: Silver
  • Indexes: Stick / Dot and Stick-shaped hands
  • Water Resistance: 50 meters

Movement:

  • Winding: Automatic
  • Brand: Longines
  • Caliber: L686
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 25
  • Power Reserve: 42 hours
  • Frequency: 28800 bph
  • Functions: Additional 24 Hour Hand (adjustable), Hours, Minutes, Small Seconds

About Longines

Longines logo

Augueste Agassiz founded Longines in 1832 in Saint-Imier, Switzerland. Now owned by the Swatch Group, the manufacture is best known for its aviator watches. Its Heritage Collection includes the Telemeter Chronograph, Heritage Retrograde, Column-Wheel Chronograph, and Heritage 1935. Longines is part of the Swatch Group group.

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