We offer a full range of repairs from our in-house watch workshop. These include part jobs like battery changes and glass replacements through to full servicing of the vast majority of brands including Omega, Tag Heuer, Longines, Rolex and, as in this instance, Breitling.
For this job we are working on a Breitling Chronomat Evolution Automatic Chronograph. This watch clearly has some kind of fault, as it is not working on arrival with us. The hands move freely and the date changes. The most likely fault is a broken mainspring, though we need to fully disassemble the movement to access the mainspring barrel to confirm this diagnosis. This is due to nature of this chronograph movement (a customised ETA 7750) – we need to remove all the chronograph work in order to fully access the mainspring barrel which lies underneath in the very depths of the mechanism.
During the course of movement disassembly it becomes apparent this watch hasn’t seen a watchmaker for some time as the oils and greases used to ensure correct functioning of the movement have started to dry up.
As we anticipated, the mainspring was found to be broken. The mainspring acts as the source of power for the watch, so a broken mainspring means a watch is not going to work. We are able to order any part to repair these movements, so we fitted a brand new mainspring. Unless in exceptional circumstances we replace the mainspring as part of a service. This ensures we have a source of power in excellent condition.
When servicing and repairing the movement it is fully disassembled and each part is checked and cleaned – going through a manual cleaning process before a cycle in our Elma Solvex RM automatic cleaning machine. Once parts are completely clean and dried, we can commence reassembly of the movement. During reassembly we follow the manufacturers technical guidelines in terms of oil and grease usage, as well as the use of other treatments such as epilame.
Alongside the movement repairs we give the case a thorough clean. We also fit replacement seals where appropriate before testing the complete case – minus the movement – in both a wet pressure tester and a dry tester to confirm water resistance. We can now reunite all elements of the watch. With the movement refitted and everything checked on the timegrapher, we can close the case back before a final dry pressure test.
With the works completed we now test the watch using an Elma Cyclomotion watch winding machine, as well as testing in static positions and for the correct functioning of all features including the chronograph and quick date change. After the testing period is complete this fantastic Breitling Chronomat Evolution Automatic Chronograph can be reunited with its owner.
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