Longines - Master Collection - L2.673.4 - Men - 2010-2020

Longines Master Collection Chronograph Moonphase L2.673.4 – 40 mm – automatic – chronograph – moon phase – full calendar – caliber L678.2

A classic and technically comprehensive Longines Master Collection, reference L2.673.4, executed in a 40 mm stainless steel case. This model combines an automatic chronograph with a full calendar, moon phase and 24-hour indicator. The silver-toned decorated dial, blued hands and black Arabic numerals give the watch the distinctive classic look of the Master Collection.

The automatic Longines caliber L678.2 is visible through the sapphire case back. The current timegrapher measurement is +2 seconds per day, with an amplitude of 286° and a beat error of 0.1 ms.

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Basic information

Brand: Longines
Collection: Master Collection
Reference: L2.673.4
Case diameter: 40 mm
Case material: stainless steel
Movement: automatic mechanical
Caliber: Longines L678.2
Functions: hours, minutes, small seconds, chronograph, day, date, month, moon phase and 24-hour indicator
Dial: silver-toned with guilloché/barleycorn texture
Crystal: sapphire crystal
Back: transparent case back
Bracelet: black Longines alligator leather strap
Clasp: Longines-signed folding clasp
Frequency: 28,800 A/h

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Important details

The L2.673.4 belongs to the more complicated variants within the Longines Master Collection. Despite the amount of information, the dial remains classically laid out.

Around the dial sits the date scale from 1 to 31, read by a central date hand. The subdial at 12 o’clock combines the day- and month indications with the chronograph minutes. At 9 o’clock you’ll find, among other things, the 24-hour indicator, and at 6 o’clock the small seconds are combined with the moon phase.

The chronograph is operated with the two pushers on the right side of the case. On the left side there is also a recessed correction button for the calendar functions.

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Year of manufacture

Estimated year of manufacture: circa late 2000s to first half of the 2010s.

Reference L2.673.4 was produced for several years in different variants. Without dated documentation, an exact production year is therefore not given.

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Case

The round case is made of stainless steel and has a strongly polished finish. The classical curved lugs flow smoothly from the case and suit the dress-watch character of the Master Collection.

Diameter: 40 mm
Material: stainless steel
Finish: mostly polished
Chronograph pushers: two polished pushers
Calendar corrector: recessed corrector on the crown side

The case is in neat used condition. The high-gloss polished surfaces show light hairline scratches and normal signs of wear, with no prominent heavy damage.

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Dial

The silver-toned dial features a fine guilloché/barleycorn texture and is one of the characteristic elements of this execution.

Time is shown by dark blued feuille hands in combination with large black Arabic numerals. The central chronograph seconds hand and the other blue indicators provide a pleasing contrast with the light dial.

At 12 o’clock are the windows for:

Day
Month

Around the dial runs a separate scale for the date from 1 to 31.

At 9 o’clock is the subdial with among other things the 24-hour indicator.

At 6 o’clock is the small seconds in combination with the moon phase. The moon-phase disc is dark blue with gold-colored stars and moon motif.

The dial and inscriptions are in very well-kept condition.

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Full calendar & moon phase

This model has an expanded calendar display.

Day: window at 12 o’clock
Month: window at 12 o’clock
Date: central date hand with scale 1–31
Moon phase: subdial at 6 o’clock
24-hour indicator: subdial at 9 o’clock

The combination of these functions makes the L2.673.4 considerably more complex than the standard three-hand and regular chronograph models in the Master Collection.

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Chronograph

The watch features an integrated chronograph display with a central chronograph second hand and additional readouts via the subdials.

The two polished pushers are located above and below the crown. The chronograph construction is based on the well-known ETA/Valjoux 7751 family, on which Longines based the L678.2 caliber.

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Movement

Inside lies the automatic Longines caliber L678.2.

Caliber: Longines L678.2
Type: automatic mechanical
Base: ETA/Valjoux 7751 family
Frequency: 28,800 A/h
Functions: time, small second, chronograph, full calendar, moon phase and 24-hour indicator
Power reserve: approx. 46 hours

Through the transparent back the movement is visible. The rotor bears the Longines signature and caliber designation L678.2. The movement is also decoratively finished, matching the Master Collection.

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Timegrapher measurement

Current measurement:
Rate deviation: +2 seconds per day
Amplitude: 286°
Beat error: 0.1 ms
Lift angle: 52°
Frequency: 28,800 A/h

These are respectable measurements for a mechanical watch of this type. The measurement is a snapshot in the tested position and does not constitute a warranty for future rate accuracy or the technical state of the movement.

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Crown and operation

The watch is equipped with a grooved Longines-signed crown.
Above and below the crown are the chronograph pushers. On the opposite side of the case there is a small recessed corrector for the calendar settings.

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Caseback

The Master Collection features a transparent case back, allowing the automatic movement to remain visible.
Around the glass back are the inscriptions:

THE LONGINES MASTER COLLECTION
ALL STAINLESS STEEL
SWISS MADE

Through the glass the automatic movement, balance and decorated rotor are visible.
The back shows light signs of wear and hairlines consistent with normal use.

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Bracelet

The watch comes with a black Longines leather strap with alligator texture and light contrasting stitching. On the inside are the Longines signature and the designation “ALLIGATOR LEATHER.”
The strap is used and shows normal wear, including light creasing and wear around the holes.

Clasp: Longines-signed folding clasp
Color: black
Stitches: light/cream-colored
Wrist circumference: approximately 20 cm, depending on the chosen setting

The polished clasp shows a few superficial scratches and hairlines from normal use.

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Condition

Case: neat used condition with light hairlines and signs of wear
Dial: very neat
Crystal: clear and well-kept
Crown and pushers: neat condition
Back: light signs of wear
Bracelet: used, with normal wear and creasing
Clasp: light superficial scratches
Movement: runs at +2 seconds per day during the measurement

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Overall condition

A well-kept example of the Longines Master Collection L2.673.4 in the classic 40 mm edition. In particular, the combination of the silver-toned decorated dial, blued hands, full calendar, chronograph and moon phase makes this one of the more technically extended models in the Master Collection.

The watch presents itself neatly, with normal light signs of wear appropriate to worn use. The automatic Longines L678.2 movement is visible through the transparent case back and shows a rate deviation of +2 seconds per day during the current timegrapher measurement.
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