Breitling service and repair

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The Valjoux 7750 Overhaul.

The Valjoux 7750 was first introduced in 1974 and is an automatic chronograph with hour recorder and date. Being relatively cheap to produce and extremely reliable, this movement has become widely adopted in various guises by many of the major watch manufacturers.

The 'Overhaul' of a 7750 'movement'.

Stage 1 - the 'Strip Down'.
Here the movement is stripped down to it's 75 constituent parts. Each part is then cleaned, check for wear and replaced if necessary. The parts are then laid out in preparation for re-assembly.

Parts of the 'movement' that are most commonly replaced, due to wear:

1. The Barrel.

2. The Rotor Bearing.

3. 3rd Wheel.

4. 4th Wheel.

5. The Minute & Hour Recording Wheel.

6. The Seconds Recording Wheel.

Stage 2 - the 'Going Side' assembly.
The movement has been assembled up to the 'going side'. The 'going side' is a watchmakers term for the watch movement assembly before the 'complications' (i.e. chronograph, automatic, moonphase etc.) are added.
This is a crucial stage of the overhaul because unless these adjustments are accurately completed the movement will not successfully drive the 'complications'.

All the endshakes of the train wheels must be adjusted and the escapement checked and lubricated. Most importantly, the balance hairspring must be adjusted to breath flat in the horizontal plane and breath evenly on expansion and contraction in the vertical. It must be set to beat evenly between the curb pins and when at rest it must sit equidistant between them.

The movement is now ready to be placed on the 'timing machine'.

KEY:

1. Movement assembled to 'going side' in the Movement holder.

2. Remaining parts:
Chronograph work;
Automatic work;
Date work.

Stage 3 - the Assembly of the Chronograph mechanism and the automatic work.
Once the movement has been checked and timed to within tolerance, the automatic and chronograph mechanisms are assembled.

On the 7750, the automatic and chronograph work is layered between two 'bridges'. Accordingly both mechanisms are assembled simultaneously.

It is important at this stage to ensure that the chronograph 'hammer' is seated squarely and evenly on both 'heart shaped cams', enabling the return to zero function to be even and accurate.

1. Movement with 'minutes & seconds' chronograph and automatic work assembled.

2. Remaining Parts.
Motion work
Date work
Hour recording and hour re-set mechanism

Stage 4 - The complete movement before 'dialling-up'.
The date work, motion work and hour recording mechanism have now been assembled and the date plate attached. The date ring is then placed in position.

This is facilitated by using the Valjoux movement holder, specifically designed for this calibre.

1. Valjoux Movement holder.

2. Remaining Parts.
Automatic weight;
Case clamps and screws

Stage 5 - 'Dialled Up'.
The overhaul is now complete.

The dial and hands are replaced and all chronograph recoring hands set to zero. The movement is now ready to be placed back into the case.

Once in the case the watch undergoes a four day test period for timekeeping, in accordance with the manufacturers specification.

The completed Valjoux 7750 overhaul.

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Fashionable, rugged and highly precise: these are just a few of the accolades one might use in describing a Breitling wristwatch. In fact, Breitling is so highly regarded that the "Navitimer" has become the standard watch for pilots around the world. One hundred and sixteen years after its founding, Breitling is one of the best-known luxury watch brands in the world.

The Breitling saga begins in 1884, when Leon Breitling - just 24 years of age - founded the company in St. Imier, Switzerland. Breitling's goal was simple: to manufacture high-quality technical watches. As his business expanded, the young watchmaker moved the factory to the Swiss village of Grenchen and began specializing in chronographs. Today, one can find chronograph pocket watches signed Breitling, which are often of very high quality.

Following World War I, Breitling began manufacturing chronographs and chronometers for airplanes. In fact, they were a pioneer in the field of aviation timekeeping. In 1942, Breitling introduced its famous "Chronomat" model - the first watch fitted with a circular slide rule bezel. With Breitling fast becoming the leading choice of pilots worldwide, it was no surprise when the Aircraft Owners and Pilots Association named the newly introduced three-register version as its official watch. The watch gained further fame when launched on the retail market as the "Navitimer". The company's fame grew even greater when astronaut Scott Carpenter wore his Breitling in space; In honor of this event the model was named the "Cosmonaute".

Like many Swiss watch companies, Breitling was hit hard by the quartz revolution, and in 1979, former pilot Ernest Schneider was hired as its new CEO. Schneider cleverly conducted a public relations campaign designed to influence people's attitudes about the bulky, oversized watch. The campaign was a huge success, coming as it did on the heels of a renewed interest in wearing mechanical wristwatches. By the late 1980's, the Breitling wristwatch, with its large case and distinctive bezel, was a recognizable status symbol all over the world and widely copied by other companies, making the "Breitling look" even more fashionable.

Despite the fact that celebrities are often photographed wearing a Breitling, these watches are also such precise timekeepers that they remain the top choice of commercial pilots. A few of the house's famous offerings include: the "Emergency" model (which is capable of sending out a radio signal if one is lost); the Montbrillant Eclipse; the "Chronomat"; and the Colt Superocean, which is both waterproof (up to 100 ATM) and COSC-rated.

If you are looking for a sporty, rugged, reliable timepiece, Breitling is clearly one company that fits the bill.

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