Longines Master Collection Master Collection 40 Moonphase Stainless Steel / Black-Roman / Bracelet

Reference L2.909.4.51.6

About this watch

The Longines Master Collection 40 Moonphase, model L2.909.4.51.6, is a masterpiece of luxury watchmaking. This elegant timepiece boasts a classic design with a black guilloché dial adorned with Roman numerals, exuding timeless appeal. The round stainless steel case (40mm diameter) and sleek design make it versatile for various occasions. At its heart beats the self-winding Longines caliber L899.2 movement, featuring a moon phase indicator and date function. This automatic movement is based on the reliable ETA A31.L91, with a frequency of 25,200 vibrations per hour and a power reserve of 64 hours. The watch's durability is ensured by its stainless steel case, resistant to corrosion and scratching. Protected by sapphire crystal, the stunning guilloché dial remains vibrant and clear. The comfortable stainless steel bracelet features a deployment clasp, adding an extra layer of sophistication. With a water resistance rating of 30 meters, this watch is suitable for light splashes but not designed for aquatic adventures. The Longines Master Collection 40 Moonphase is an investment in style and craftsmanship, available at authorized retailers or luxury boutiques.
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Key Features

  • Black guilloché dial with Roman numerals
  • Self-winding Longines caliber L899.2 movement
  • Moon phase indicator and date function
  • Stainless steel case (40mm diameter)
  • Sapphire crystal protection
  • Comfortable stainless steel bracelet with deployment clasp
  • 30 meters water resistance

Specifications

Brand
Longines
Family
Master Collection
Model
Master Collection 40 Moonphase Stainless Steel / Black-Roman / Bracelet
Reference
L2.909.4.51.6
Movement
l899-2
Movement Features
  • Hours, Minutes, Small Seconds
  • Date
  • Moonphase
Case
Stainless Steel 40mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
30

Current Listings

[WTS] Longines Master Collection, Triple Date Moonphase 40mm OEM Bracelet + Leather Strap - $1,890

Longines Master Collection, Triple Date Moonphase 40mm OEM Bracelet + Leather Strap - $1,890

Longines - L2-673-4-78-3 · $1,890
Up for sale is my very good condition Longines Master Collection, with the Triple Date and Moonphase complication.

  • Condition: Very good condition
  • Case material: Steel
  • Crystal status: Clean
  • Bracelet type: Original Longines
Posted at
Mar 31, 2026, 9:45 PM
Active
[WTS] Longines Master Collection - Retrograde -  Silver "barleycorn" dial - Sun and Moon + Moon-phase - 44mm - With Card

Longines Master Collection - Retrograde - Silver "barleycorn" dial - Sun and Moon + Moon-phase - 44mm - With Card

A highly complicated Longines Master Collection Retrograde watch featuring a silver 'barleycorn' dial and a self-winding mechanical movement. It includes functions such as GMT moonphase, retrograde hands, small seconds, 24-hour second time zone, and a day-night indicator.

  • Condition: Excellent, works perfectly with no issues
  • Size: 44mm diameter
  • Lug width: 22mm
  • Water resistance: 3 bar
Posted at
Mar 25, 2026, 2:49 PM
Active
[WTS] Longines Master Collection L2.773.4.78.3 Moonphase Automatic Box and Papers

Longines Master Collection L2.773.4.78.3 Moonphase Automatic Box and Papers

Longines - L2.773.4.78.3 · $2,190
The Longines Master Collection L2.773.4.78.3 is an elegant automatic wristwatch featuring a white dial, full calendar display, moonphase display, and running seconds.

  • Condition: Excellent, with light signs of careful wear on case and crystal
  • Case size: 42mm
  • Movement accuracy: +8 seconds per day
  • Bracelet/strap material: leather
Posted at
Mar 19, 2026, 2:37 PM
Active