Longines Master Collection Master Collection Power Reserve

Reference L2.666.4.51.6

About this watch

The Longines Master Collection Power Reserve (L2.666.4.51.6) is a masterpiece of elegance and precision. Founded in 1832, Longines has a rich heritage in watchmaking, combining traditional techniques with modern advancements. The round stainless steel case exudes durability and sophistication, while the sleek black guilloche dial catches the light beautifully. The automatic movement, based on the reliable ETA 2897, ensures precise timekeeping with a frequency of 28800 vibrations per hour. One of the standout features is the power reserve indicator, letting you know how much power is left in the watch's reserve—up to 42 hours. With its blend of classic design, reliable functionality, and reasonable pricing, this watch is perfect for everyday wear, suitable for both casual and formal occasions. Whether you're dressing up for a gala or simply heading to the office, this watch is the perfect accessory to keep you punctual and stylish.
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Key Features

  • Elegant round stainless steel case
  • Sleek black guilloche dial
  • Automatic movement with 28800 vibrations per hour
  • Power reserve indicator up to 42 hours
  • Durable water resistance of 30 meters
  • Classic Roman numeral indexes and feuille hands
  • Affordable luxury price point

Specifications

Brand
Longines
Family
Master Collection
Model
Master Collection Power Reserve
Reference
L2.666.4.51.6
Movement
l602
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Power Reserve Indicator
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
30

Current Listings

[WTS] Longines Master Collection World Time Ref. L2.631.4.70.6 | Excellent Condition (Box, Booklet, Card) | $1550

Longines Master Collection World Time Ref. L2.631.4.70.6 | Excellent Condition (Box, Booklet, Card) | $1550

Longines - L2.631.4.70.6 · $1,550
The Longines Master Collection World Time Ref. L2.631.4.70.6 features a silver barleycorn dial, blued steel hands, and Arabic numerals on a stainless steel case.

  • Condition: Excellent Condition
  • Case size: 38.5mm
  • Crystal condition: nice and clean
  • Bracelet length: up to 20cm (8 inches)
Posted at
Apr 21, 2026, 12:01 AM
Active
[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