Longines Master Collection Master Collection 40 Chronograph Calendar Stainless Steel / Silver / Alligator

Reference L2.673.4.78.3

Longines Master Collection 40 Chronograph Calendar Stainless Steel / Silver / Alligator

About this watch

The Longines Master Collection 40 Chronograph Calendar is a masterpiece that exudes sophistication and functionality. With its refined design and intricate movements, it's a watch that not only tells time but tells a story. The 40mm stainless steel case boasts a polished finish that catches the light in all the right ways, while the silver guilloche dial provides a stunning backdrop for the watch's features. The addition of the moonphase indicator adds an astronomical touch, allowing you to track the lunar cycle—a perfect blend of beauty and functionality. At the heart of this timepiece is the Longines caliber L678.2, a self-winding movement based on the ETA/Valjoux 7751, with 25 jewels and a frequency of 28,800 vibrations per hour. The 42-hour power reserve means you can take the watch off for a day or two and still have it running when you put it back on. With an additional 24-hour hand, a full calendar displaying the day, date, and month, this watch is designed for those who appreciate the finer details in life.
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Key Features

  • 40mm stainless steel case with polished finish
  • Silver guilloche dial with intricate pattern
  • Moonphase indicator with astronomical touch
  • Chronograph feature with intuitive interface
  • Longines caliber L678.2 self-winding movement
  • 42-hour power reserve
  • Additional 24-hour hand and full calendar display

Specifications

Brand
Longines
Family
Master Collection
Model
Master Collection 40 Chronograph Calendar Stainless Steel / Silver / Alligator
Reference
L2.673.4.78.3
Movement
l678-2
Movement Features
  • Hours, Minutes, Small Seconds, Additional 24 Hour Hand (fixed)
  • Date, Day, Month
  • Chronograph
  • Moonphase
Case
Stainless Steel 40mm
Dial Color
Silver
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 is a modern travel watch with a stainless steel case, silver barleycorn dial, and world-time city ring.

  • Condition: Excellent
  • Case size: 38.5mm diameter
  • Bracelet length: up to 20cm (8 inches)
  • Movement: Longines Calibre L635 (based on ETA 2824-2 with GMT/world-time complication)
Posted at
May 10, 2026, 10:47 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection Moonphase L2.909.4.78 — 40mm — Full Kit — $1,699 Shipped 🔥

Longines Master Collection Moonphase L2.909.4.78 — 40mm — Full Kit — $1,699 Shipped 🔥

Longines - L2.909.4.78 · $1,699
A Longines Master Collection Moonphase watch in a 40mm case, featuring a moon phase display.

  • Condition: Good overall, with light hairlines throughout.
  • Case size: 40mm
  • Shipping options: FedEx 2-Day fully insured (+$15 overnight)
  • Shipping location: Chicago
Posted at
May 10, 2026, 7:59 PM
Active
View listing on r/WatchExchange
[WTS] LONGINES MASTER COLLECTION MOONPHASE 42mm

LONGINES MASTER COLLECTION MOONPHASE 42mm

Longines - L2.919.4.92.6
A Longines Master Collection Moonphase watch with a 42mm diameter and moon phase functionality.

  • Condition: New
  • Case Size: 42mm diameter
  • Box And Papers: true
Posted at
May 9, 2026, 4:10 PM
Active
View listing on r/WatchExchange
[WTS] 2022 Longines Master Collection L26734920 Moonphase Blue dial - Box + Papers

2022 Longines Master Collection L26734920 Moonphase Blue dial - Box + Papers

Longines - L26734920 · $2,890
The Longines Master Collection is an elegant and highly regarded automatic wristwatch that blends classic watchmaking with refined complications. It features a blue dial with a full calendar display, moonphase display, and running seconds.

  • Condition: attractive condition with honest signs of previous wear
  • Case size: 42mm diameter
  • Movement type: automatic
Posted at
May 8, 2026, 2:46 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection l26734786

Longines Master Collection l26734786

Longines - L2.673.4.78.6 · $2,100
A classic piece that blends timeless design with everyday wearability, perfect for both formal and casual occasions.

  • Condition: 9/10 (very well cared for)
  • Movement type: Automatic
  • Complications: Chronograph + day/date
Posted at
May 1, 2026, 11:19 AM
Active
View listing on r/WatchExchange
[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 modern travel watch design with a stainless steel case and silver barleycorn dial. It includes a world-time city ring, 24-hour scale, and GMT/world-time complication powered by the modified ETA 2824-2 movement.

  • Condition: Excellent
  • Case size: 38.5mm diameter
  • Bracelet length: up to 20cm (8 inches)
  • Movement type: Longines Calibre L635, based on the ETA 2824-2
Posted at
Apr 29, 2026, 9:19 PM
Active
View listing on r/WatchExchange