Longines - Saint-Imier - Full Set - L2.752.4 - Men - 2020

Longines Saint-Imier Chronograph L2.752.4 – Full Set – 40 mm – automatic – black dial – caliber L688.2

A stylish Longines Saint-Imier automatic chronograph with a classic black dial, three recessed sub-dials, and a full stainless steel construction. The Saint-Imier collection combines Longines’ traditional look with an technically interesting automatic chronograph movement with a column wheel.

This piece is offered as a full set, including Longines inner and outer box, international warranty card, user manual, and extra links.

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Basic Information
Brand: Longines
Collection: Saint-Imier
Reference: L2.752.4
Diameter: 40 mm
Case material: stainless steel
Dial: black
Movement: automatic mechanical
Caliber: Longines L688.2
Functions: hours, minutes, central second, date and chronograph
Crystal: sapphire crystal
Case back: transparent case back
Bracelet: stainless steel Longines bracelet
Clasp: Longines-signed folding clasp
Set: full set

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Important Details
The black dial features a classic chronograph layout with three recessed sub-dials and a large raised Arabic 12 at the 12 o’clock position.

The polished hour markers and hands nicely contrast with the dark background. The central hour and minute hands are equipped with luminous material.

Around the dial is a detailed minute and second scale. The date window is placed between four and five o’clock.

The chronograph is operated with the two rectangular pushers on the right side of the case.

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Year of Manufacture
Year: 2020.

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Case
The round case is made of stainless steel and measures 40 mm in diameter.
The case surfaces are predominantly polished, giving the watch a classic and luxurious appearance. The curved lugs sit nicely against the steel bracelet.
On the right side are the crown and two chronograph pushers. On the left side is a recessed corrector.
The case shows light signs of wear and fine hairlines consistent with normal use. No noticeable heavy damage.

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Dial
The black dial is structured with three sub-dials:
Sub-dial at 3 o’clock: chronograph function
Sub-dial at 6 o’clock: 12-hour chronograph counter
Sub-dial at 9 o’clock: small seconds

The sub-dials have a fine concentric texture, making them clearly stand out against the black main dial under varying light.
The raised polished hour markers, the large 12, and the silver-tone hands provide a classic Saint-Imier look.
The date display is between four and five o’clock.
The dial and inscriptions appear neat and crisp.

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Movement
The watch is equipped with the automatic Longines caliber L688.2.
This mechanical chronograph movement features a column-wheel construction for chronograph operation.
Caliber: Longines L688.2
Type: automatic mechanical
Frequency: 28,800 A/h
Chronograph: yes
Column wheel: yes
Date: yes
Power reserve: approx. 54 hours

Via the transparent case back the movement is visible, including the Longines-branded rotor and the decorative finishing of the mechanism.

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Chronograph
The chronograph is operated via the two pushers beside the crown.
The central long seconds hand is used for chronograph seconds, while the sub-dials record elapsed time.
The use of a column-wheel mechanism is a technical feature of the L688.2 caliber and distinguishes this Saint-Imier from many conventional automatic chronographs.

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Timegrapher Reading
During measurement the watch showed the following values:
Rate deviation: -29 seconds per day
Amplitude: 301°
Beat error: 0.0 ms
Lift angle: 52.0°
Frequency: 28,800 A/h

The amplitude is strong and the beat error is 0.0 ms. The measured daily rate deviation of -29 seconds is clearly slow. Regulation and possibly technical service may be desirable if a more precise daily rate is required.
A timegrapher measurement is a snapshot and does not constitute a guarantee of future accuracy or condition of the movement.

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Crown and Operation
The knurled crown bears the Longines logo.
Above and below the crown are the polished chronograph pushers. The operation visually complements the polished case.

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Case Back
The watch has a transparent case back allowing the automatic movement to be seen.
Around the display window are the Longines and Saint-Imier markings and the material designation for stainless steel.
The back shows light signs of wear and fine hairlines, consistent with normal use.

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Stainless Steel Bracelet
The watch is fitted with a multi-link stainless steel Longines bracelet.
The bracelet combines wide and narrow links and closes in a design that harmonizes with the elegant Saint-Imier case.
The folding clasp is stamped LONGINES and features the winged hourglass logo.
The bracelet shows light signs of wear and shallow hairlines.
The current size is around 17–18 cm wrist circumference. Additional loose links are included to further size the bracelet.

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Included
Longines Saint-Imier L2.752.4
Longines stainless steel bracelet
Extra links
Longines inner box
Longines outer box
Longines International Warranty card
Longines manual / World Service booklet
Full set.

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Condition
Case: nicely used with light hairlines and signs of wear
Dial: very nice condition
Crystal: clear and neat
Crown and pushers: neat condition
Stainless bracelet: light normal signs of wear
Clasp: light superficial signs of wear
Back: light hairlines and signs of use
Movement: functional during the measurement; measured at -29 sec/day

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Overall Condition
A tidy Longines Saint-Imier L2.752.4 automatic chronograph in full stainless steel. The combination of the 40 mm case, black dial, three sub-dials, stainless steel bracelet, and the automatic L688.2 column-wheel chronograph movement gives the model both a classic and technical appeal.
The watch is sold as a full set with inner and outer boxes, warranty card, documentation, and extra links. The cosmetic condition is well kept with normal light signs of use. The timegrapher shows a good amplitude and a beat error of 0.0 ms, but with a rate deviation of -29 seconds per day regulation or service may be desirable for a more precise daily rate.