Longines - Saint-Imier - L2.753.4 - Men - 2010-2020

Longines Saint-Imier Chronograph L2.753.4 – 38.5 mm – automatic – chronograph – date – caliber L688.2

This Longines Saint-Imier L2.753.4 is a classic automatic chronograph from the Saint-Imier Collection. The watch combines a polished stainless steel case of 38.5 mm with a light dial, black Arabic numerals, and blued hands. The chronograph is powered by the automatic Longines caliber L688.2 with column-wheel construction.

──────────────────
Basic information

Brand: Longines
Collection: Saint-Imier Collection
Reference: L2.753.4
Case diameter: 38.5 mm
Case material: stainless steel
Movement: automatic mechanical
caliber: Longines L688.2
Functions: hours, minutes, central second, chronograph and date
Dial: silver/white
Crystal: sapphire crystal
Case back: transparent case back
Clasp: Longines-signed folding clasp
Frequency: 28,800 A/h
Power reserve: approximately 54 hours

──────────────────
Important details

The Saint-Imier Collection is named after the Swiss town where Longines was founded in 1832. This version stands out for its combination of classic Arabic numerals and a technically implemented automatic chronograph.

An important technical feature is the Longines L688.2 caliber. This automatic chronograph movement uses a column-wheel for the operation of the chronograph function.

The chronograph is operated with two rectangular pushers on the right side of the case. On the left side there is also a recessed corrector.

──────────────────
Estimated year of manufacture

Estimated year of manufacture: circa 2012–2015.
The Saint-Imier Collection was produced in this period, and this version with the L688.2 caliber belongs to that generation. Without dated warranty documents, an exact production year cannot be established.

──────────────────
Case

The round case is made of stainless steel and features predominantly high-gloss polished surfaces.

Diameter: 38.5 mm
Material: stainless steel
Finish: mostly polished
Chronograph pushers: two rectangular pushers
Corrector: recessed push-corrector on the left side
Crystal: sapphire crystal

The case has curved, relatively pronounced lugs which give the watch a sturdy presence on the wrist despite its classic diameter.

There are normal signs of wear and fine hairlines on the polished surfaces. Around some edges and near the pushers there are localized, clearer superficial marks. No significant heavy damage is present.

──────────────────
Dial

The silver/white dial features a classic chronograph layout with three recessed subdials.

The black Arabic numerals provide strong contrast against the light background. Around the outer edge runs a detailed minute/second scale.

The main hands are blued with a light inlay. The subdial hands are also blue.

Layout:
Chronograph seconds: central hand
30-minute counter: subdial at 3 o'clock
Running seconds: subdial at 9 o'clock
12-hour counter: subdial at 6 o'clock
Date: diagonally placed between 4 and 5 o'clock

The three subdials feature a fine concentric texture, adding depth to the dial.

──────────────────
Movement

Inside lies the automatic Longines L688.2 caliber.

Caliber: L688.2
Type: automatic mechanical chronograph movement
Frequency: 28,800 alternations per hour
Chronograph operation: column wheel
Power reserve: approximately 54 hours

Through the transparent case back, the movement is visible. The rotor bears Longines branding and decorative finishing.
The column-wheel system is a key technical feature of this generation of Longines chronographs and provides the mechanical control for the start, stop, and reset of the chronograph.

──────────────────
Timegrapher measurement

Measured rate deviation: +23 seconds per day
Amplitude: 303°
Beat error: 0.0 ms
Lift angle: 52.0°
Frequency: 28,800 A/h

The amplitude is strong and the beat error measured at 0.0 ms. The measured rate deviation of +23 seconds per day is on the high side; regulation may be desirable if a more precise daily rate is required.
This timegrapher measurement is a snapshot in one position and does not constitute a guarantee of future accuracy or the technical condition of the movement.

──────────────────
Chronograph

The watch features a fully mechanical chronograph.

The central long hand records the chronograph seconds. The 3 o'clock counter records up to 30 minutes, and the 6 o'clock counter records elapsed hours. The running seconds for normal time display are at 9 o'clock.

Operation is via the two rectangular pushers on either side of the crown.

──────────────────
Date

Between roughly 4 and 5 o'clock there is a separate date window.
The window is diagonally placed in the dial and framed, matching the classic styling of the model.

──────────────────
Crown

The grooved crown features the Longines winged hourglass logo.
On either side of the crown are the rectangular chronograph pushers.

──────────────────
Case back

The watch has a transparent case back, keeping the automatic movement visible.
Around the viewing window are indications of the Saint-Imier Collection, Swiss Made, and stainless steel.
The automatic movement and the signed rotor are clearly visible through the glass back.

──────────────────
Band and clasp

The watch comes with a brown leather strap featuring a crocodile texture and contrasting stitching.
The leather strap has been replaced and is not the original Longines strap.
The Longines-signed folding clasp is present. The clasp shows light signs of wear and minor scratches consistent with normal use.
Wrist size: approximately 20 cm.

──────────────────
Condition

Case: good used condition with light to normal hairlines and signs of wear
Dial: very good condition
Crystal: good condition with no noticeable heavy damage
Crown and pushers: good used condition
Case back: light signs of wear
Band: replaced, not original
Clasp: Longines-signed folding clasp, with light signs of wear
Movement measurement: +23 sec/day, 303° amplitude and 0.0 ms beat error

──────────────────
Overall condition

A neat Longines Saint-Imier automatic chronograph in the classic 38.5 mm configuration. The combination of a light dial, black Arabic numerals, blued hands, and three subdials gives the watch a distinctly classic chronograph look.
Technically, this version is distinguished by the automatic Longines L688.2 column-wheel chronograph caliber, visible through the transparent case back. The watch shows normal signs of wear suitable for a worn example. The measured amplitude and beat error are nice; due to the measured deviation of +23 seconds per day, regulation may be desirable.