Slava 2427

The Slava 2427 is an automatic double date movement manufactured by Slava in the Soviet era. It measures 24.25 mm in diameter and contains 27 jewels, featuring sweep seconds, hand winding, quickset date, and instantaneous date change with Russian-style three-arm shock protection. The movement has faced criticism for reliability issues, particularly shock sensitivity from its thin balance staff, premature rotor bearing wear, and frequent date indicator failures. Production is discontinued, though the caliber appeared in Poljot-International watches such as the Tsars of Russia series.