Greiner adjustment

Central cutting, viroling using a Greiner tool, fitting the spring onto the balance wheel, counting, marking, outer opening, flat centering control and adjustment, then pinning.

Traditional adjustments

First counting, search for the P.A. (point of attachment), central cutting and viroling with a traditional collar, fitting onto the balance wheel followed by a second counting, flat centering, outer opening, then pinning.

Breguet adjustments

First counting, search for the P.A. (point of attachment) with calculation of the displacement due to the curve, viroling with a traditional collar, fitting onto the balance wheel, second counting, flat centering, marking, installation of the Breguet curve, pinning, and then testing on the plate.