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 Silver Dial, $1700

Longines Master Collection Silver Dial, $1700

Longines - L2.628.4.78.6 · $1,700
The seller is listing a Longines Master Collection Silver Dial watch, and they are open to a video call pre-purchase to build trust.

  • Condition: Preowned
  • Shipping cost (usa): 100
  • Payment methods: Wire or Credit Card (+4.9% & 4 days clearance)
  • References: 290+ verified sales on Watcexchange, Instagram (@worthytimeholdings), Google page (Worthytime Holdings), and r/tudor (search u/pacodo)
Posted at
Apr 20, 2026, 11:55 AM
Active
[WTS] 2024 Longines Master Collection Moonphase Chronograph - $2,250

2024 Longines Master Collection Moonphase Chronograph - $2,250

Longines - L2-673-4-78-6 · $2,250
A 2024 Longines Master Collection Chronograph in mint condition, presented as a full kit with a moonphase and chronograph function.

  • Condition: Mint condition
  • Included: Full kit
Posted at
Apr 14, 2026, 11:28 PM
Active
[WTS] Longines Master Collection Silver Small Seconds - Full Kit

Longines Master Collection Silver Small Seconds - Full Kit

Longines - L2.843.4.73.2 · $1,825
A dress watch with a crystalline silver dial and blued-steel handset, featuring a 38mm case and 10.2mm height.

  • Condition: Very close to mint condition
  • Case dimensions: 38 mm diameter, 45 mm lug-to-lug
  • Height: 10.2 mm
  • Lug width: 20 mm
Posted at
Apr 11, 2026, 9:55 PM
Active