Friday, February 10, 2017


The Breguet template with the Breguet terminal curve

Theren trying out bending of the Breguet

Eddie giving the Breguet a try
This week the students learned how to bend the long awaited Breguet Overcoil.  The Phillips Terminal Curve and Breguet Overcoil is used to overcome the Caspari effect, which is one characteristic that affects isochronism.  It is considered a higher skill to be able to bend an overcoil since it is not so easy and it affects time keeping greatly.

students working hard

Tomas centering a hole from his Tourbillion cage

Geneva stripes testing on the Aciera F1

Shuai turning the chronograph seconds hand tube
Besides learning about the Breguet hairsprings the students continued to work on their seperate projects.  Shuai finished the restoration of a Valjoux 72 and is now working on a second one.  This time he had to make a new chronograph seconds hand tube.  Eddie continued on the design of his school watch while finishing some timing exercises at the same time.  Theren made some bridges for his jumping second mechanism and is now starting to make the pallet fork bridge and balance bridge.  Simone tested out different types of finishing in preparation of decorating his school watch mainplate.  He has tried circular graining and côtes de Genève and will continue to test in the following week.  Tomas made the fixed fourth wheel for his tourbillion and is getting ready to make the pallet fork next week.

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