Panerai caliber P.2006/3
The P.2006 hand-wound mechanical calibre was developed from the P.2004 single-button chronograph, but in addition it has the split-seconds function, controlled by a second button at 10 o’clock: two superimposed central hands permit the measurement of two events simultaneously or the measurement of split times. The power reserve is 8 days and this is displayed on the dial by a linear indicator. While sharing the vertical clutch of the chronograph, the P.2006 differs from the P.2004 calibre in that it has a second column wheel and two centre wheels, connected to the respective superimposed hands: the first and main one is the chronograph hand itself and the second is the split-seconds hand. The complex construction of the P.2006 calibre involves the use of special, highly resistant materials, in particular for the arbors of the chronograph hands, which are fitted one inside the other, and which are 14 mm long. The P.2006 calibre also has the seconds reset device which resets the seconds hand to zero, enabling the watch to be synchronized perfectly with a reference time signal. The operation of the system designed by Officine Panerai is unique: when the winding crown is pulled out to the second position, a thin blade moves into contact with the balance wheel, stopping it. At the same time, a small hammer lever moves downwards and acts on a heart-shaped cam which instantly moves the seconds hand to the zero position. As soon as the winding crown is returned to the normal position, the balance wheel is freed, the hammer lever is raised, thus releasing the cam, and the seconds hand resumes its normal course.