Movement with the balance read to be disassembled.
Centering the new jewel on the 'wax' chuck, to replace cracked jewel.
Turning chaton to size.
View of jewel cemented with shellac to chuck.
Removing 2nd balance staff from staff.
Balance wheel and 2nd balance staff. This was one I turned previously during initial restoration.
View of cracked jewel.
The finished jewel on left side ready to be placed on the balance bridge.
Turning the back side of the jewel to size.
Jewels for comparison. Cracked jewel on the left side.
Polishing the jewel down to correct thickness.
View of jewel during reduction of thickness.
Now to the balance staff. Getting the gravers ready to be sharpened.
Initial rough sharpening, then with a wet sandstone for final mirror polish of blade.
Choosing the correct diameter blued-steel for the balance staff.
Measuring the balance staff.
Before the work begins.
Staring off with a blue wire 1.8mm diameter, first pivot being turned.
First rough testing with gague.
Checking pivot size with a more accurate jewel gague.
Visual check of length.
Turning balance wheel seat.
Testing size of seat with balance wheel.
Turning now the bottom part of the balance staff.
Turning the jewel roller seating.
Moving onto the bottom pivot.
Before parting and then finishing on the Jacot lathe.
Comparison of second and third staffs.
Comparison of differences. New staff has long pivots to test height of balance wheel.
Checking roller table seating.
Checking bottom pivot size.
Staking the balance wheel to the staff.
Balance wheel and staff.
Checking for correct play on the watch.
Balancing the balance wheel.
Turning a new staff.
Progress on the fourth staff.
Three staffs with different characteristics.
Staking the new staff.
New balance in place.
Checking the trueness of the balance wheel.
Replacing the safety pin on the escape lever so that balance doesn't over bank.
Initial placement of the brass sliver or splinter.
New safety pin Installed and cut to size.