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.
Buy Now on Jomashop
This is an affiliate link

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 Triple Calendar Moonphase Chronograph L2.673.4.78.3 40mm | Fresh Service, Full Set | $1,899 Shipped

Longines Master Collection Triple Calendar Moonphase Chronograph L2.673.4.78.3 40mm | Fresh Service, Full Set | $1,899 Shipped

Longines - L2.673.4.78.3 · $1,899
A beautiful Longines Master Collection Triple Calendar Moonphase Chronograph featuring a chronograph, triple calendar, moonphase, and 24-hour display on an elegant guilloché silver dial.

  • Condition: Excellent
  • Case Size: 40mm
  • Lug To Lug: ~48mm
  • Thickness: ~14.5mm
Posted at
May 26, 2026, 11:11 AM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection World Time Ref. L2.631.4.70.6 | Excellent Condition (Box, Booklet, Card) | $1545

Longines Master Collection World Time Ref. L2.631.4.70.6 | Excellent Condition (Box, Booklet, Card) | $1545

Longines - L2.631.4.70.6 · $1,545
The Longines Master Collection World Time Ref. L2.631.4.70.6 is a modern travel watch with a well-proportioned stainless steel case and a silver barleycorn dial. It features a world-time city ring, 24-hour scale, and a jumping hour hand for adjusting between time zones.

  • Condition: Excellent
  • Case size: 38.5mm
  • Movement: Longines Calibre L635 (ETA 2824-2 modified)
Posted at
May 24, 2026, 9:52 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection Triple Date Moonphase Chronograph 42mm with box - $1,890

Longines Master Collection Triple Date Moonphase Chronograph 42mm with box - $1,890

Longines - L2-773-4-78-3 · $1,890
Up for sale is my Longines Master Collection, Triple Date Moonphase Chronograph 42mm. The watch has a steel case, chronograph function, moonphase complication, and comes with its original box.

  • Condition: Great condition with minimal marks on the case sides and caseback, light hairlines on the high polished bezel and bracelet centerlinks/sides
  • Case size: 42mm
  • Bracelet size: up to 7-7.25inch wrists depending on wrist shape
Posted at
May 19, 2026, 8:56 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection Complete Calendar Chronograph ref. L2.773.4.78.6 | Excellent Condition (Full Set: Box, Papers, Card, Purchase Invoices With International Warranty Until 2029) | $2400

Longines Master Collection Complete Calendar Chronograph ref. L2.773.4.78.6 | Excellent Condition (Full Set: Box, Papers, Card, Purchase Invoices With International Warranty Until 2029) | $2400

Longines - L2.773.4.78.6 · $2,400
Up for sale is the Longines Master Collection Complete Calendar Chronograph ref. L2.773.4.78.6, a traditional Swiss watch with a lot of mechanical charm packed into a single piece.

  • Condition: Excellent
  • Case Size: 42mm diameter
  • Thickness: 14.2mm
  • Movement Type: Automatic Chronograph
Posted at
May 18, 2026, 11:14 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection Salmon Dial 38.5mm L2.843.4.93.2 Full Set

Longines Master Collection Salmon Dial 38.5mm L2.843.4.93.2 Full Set

Longines - L2.843.4.93.2 · $1,800
The Longines Master Collection features a stunning salmon dial with black Arabic numerals and blued/black polished hands, giving it an elegant vintage-inspired look.

  • Condition: Excellent / barely worn
  • Case size: 38.5mm
  • Thickness: 10.2mm
  • Movement: Longines Caliber L893
Posted at
May 18, 2026, 10:34 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection L2.893.4.78.6. 42mm Black Dial Automatic on Bracelet Full Kit - $1,425

Longines Master Collection L2.893.4.78.6. 42mm Black Dial Automatic on Bracelet Full Kit - $1,425

Longines - L2.893.4.78.6 · $1,425
This Longines Master Collection automatic watch features a stainless steel case, black textured dial with Roman numeral hour markers, and date display at 3 o'clock. It comes as a full kit with box, papers, booklet, and accessories.

  • Condition: Pre-owned in very good overall condition
  • Case size: 42mm
  • Movement type: Automatic
  • Water resistance: 30m
Posted at
May 15, 2026, 3:17 PM
Active
View listing on r/WatchExchange
[WTS] Longines Master Collection 40mm Rose Gold L2.793.5.79.7 w Box $1900

Longines Master Collection 40mm Rose Gold L2.793.5.79.7 w Box $1900

Longines - L2.793.5.79.7 · $1,900
A rose gold dress watch with a 40mm case, available as a standalone timepiece or paired with its matching 18K rose gold bracelet.

  • Condition: Good shape
  • Material: Rose Gold
  • Bracelet material: 18K Rose Gold
Posted at
May 14, 2026, 3:07 PM
Active
View listing on r/WatchExchange