The P.2002 hand-wound calibre is the progenitor of the P.2000 series and it takes its name from the year in which the project was launched to supply Panerai watches with movements entirely designed and developed at the Manufacture in Neuchâtel. The P.2002 calibre consists of 247 components; it has 21 jewels and a thickness of 6.6 millimetres. Hand-wound and with a power reserve of 8 days with linear indicator on the dial, it has the characteristics peculiar to all the calibres of the P.2000 series: great structural strength; three spring barrels; GMT function with 24-hour indicator; seconds reset device; rapid adjustment of local time; free-sprung balance; balance wheel oscillating at 28,800 alternations per hour (a frequency which is unusual in a movement with a large power reserve). The three spring barrels in series, the design of which is an Officine Panerai patent, ensures the delivery of an even, optimal force which remains stable for 8 days, thus delivering a force which is constant for all the days of the power reserve. The P.2002 calibre also has the seconds reset device which resets the seconds hand to zero, enabling the watch to be synchronised 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.
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