Longines Master Collection Master Collection Power Reserve

Reference L2.666.6.78.5

About this watch

The Longines Master Collection Power Reserve is a magnificent blend of elegance, functionality, and timeless design. This luxury timepiece tells time with precision, looks stunning on the wrist, and offers a glimpse into the artistry of Swiss watchmaking. Crafted from yellow gold and featuring a beige guilloche dial, this 42 mm round case watch exudes sophistication and charm. The Longines caliber L602 automatic movement, based on the renowned ETA 2897, boasts a power reserve of 42 hours and 21 jewels for smooth operation. With sapphire glass and a water resistance rating of 30 meters, this watch is suitable for everyday wear. Whether you're at the office or out for a casual evening, this watch feels just right. It's an investment that's sure to pay off in style and performance, perfect for collectors, professionals, or anyone looking to elevate their style.
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Key Features

  • Yellow gold casing
  • 42 mm round case
  • Beige guilloche dial
  • Sapphire glass
  • Automatic movement (Longines caliber L602)
  • Power reserve of 42 hours
  • 21 jewels for smooth operation
  • Water resistance rating of 30 meters

Specifications

Brand
Longines
Family
Master Collection
Model
Master Collection Power Reserve
Reference
L2.666.6.78.5
Movement
l602
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Power Reserve Indicator
Case
Yellow Gold 42mm
Dial Color
Beige
Crystal
Sapphire
Water Resistance
30

Current Listings

[WTS] Longines Master Collection. Triple Date. Moonphase. $1795 only !!

Longines Master Collection. Triple Date. Moonphase. $1795 only !!

A Longines Master Collection watch featuring a triple date, moonphase, and chronograph functions in a 42mm automatic movement.

  • Condition: Clean
  • Case Diameter: 42mm
  • Shipping Details: Fedex with insurance, global shipping available
Posted at
Aug 21, 2025, 7:25 PM
Active
[WTS] Longines Master Collection Chrono Moonphase 40MM (L2.673.4.78.6), Longines Leather Strap, Additional Straps $2500

Longines Master Collection Chrono Moonphase 40MM (L2.673.4.78.6), Longines Leather Strap, Additional Straps $2500

Longines - L2.673.4.78.6 · $2,500
This is a Longines Master Collection Chrono Moonphase watch with box and warranty card, featuring a leather strap and additional straps.

  • Condition: Minor surface marks, no functional issues
  • Case Size: 40mm
  • Box And Papers: true
Posted at
Aug 20, 2025, 8:39 PM
Active
Pre-Owned Longines Master Collection 190th Anniversary L2.793.4.73.2

Pre-Owned Longines Master Collection 190th Anniversary L2.793.4.73.2

Longines - L2.793.4.73.2 · $1,649.002
A pre-owned Longines Master Collection 190th Anniversary watch in silver, featuring an automatic movement and stainless steel case. The watch comes with two straps, including an aftermarket blue leather strap.

  • Condition: 88% condition due to slight marks on the lugs, bezel, and case, with a slightly creased strap and worn clasp
  • Movement: Automatic
  • Case size: 40mm diameter
  • Material: Stainless Steel
Posted at
Aug 14, 2025, 1:44 AM
Active
[WTS] Longines Master Collection. Moonphase. 42mm. Clean.

Longines Master Collection. Moonphase. 42mm. Clean.

A Longines Master Collection watch features a moonphase, triple date, chronograph, and automatic movement in a 42mm case.

  • Condition: Clean
  • Case size: 42mm
  • Movement type: Automatic
Posted at
Aug 12, 2025, 8:23 PM
Active