Minute repeating calibers are almost exclusively manual winding... but Patek wanted to offer collectors something really special, and they certainly succeeded. This caliber has 39 jewels, free-sprung balance adjusted to temperature, isochronism and in 5 positions, a 22k micro-rotor, and is stamped with the Geneva Seal. Strap is black hand-sewn Patek Philippe crocodile with platinum Patek tang buckle.