Rare Soviet First Moscow Watch Factory 13ЧП Aviation Astrono...
Rare Soviet First Moscow Watch Factory 13ЧП Aviation Astronomical two-day chronometer, No. 2624 complete with its electrically heated and spring shock-mounted box, the 4.25" silvered Arabic dial with 56-hour up/down indicator over constant seconds, the fusee movement with split compensated balance, helical hairspring and anchor escapement in brass casing, the square case 7.5" wide, 7" high
** The 13ЧП is an aviation astronomical chronometer, intended to provide an accurate time reference for celestial navigation aboard aircraft and for use in conjunction with an aircraft sextant
** Unlike the traditional detent escapement normally associated with a marine chronometer, the 13ЧП uses a lever (anchor) escapement, better suited to the vibration and movement encountered aboard an aircraft
** From the David Read Collection
Rare Soviet First Moscow Watch Factory 13ЧП Aviation Astronomical two-day chronometer, No. 2624 complete with its electrically heated and spring shock-mounted box, the 4.25" silvered Arabic dial with 56-hour up/down indicator over constant seconds, the fusee movement with split compensated balance, helical hairspring and anchor escapement in brass casing, the square case 7.5" wide, 7" high
** The 13ЧП is an aviation astronomical chronometer, intended to provide an accurate time reference for celestial navigation aboard aircraft and for use in conjunction with an aircraft sextant
** Unlike the traditional detent escapement normally associated with a marine chronometer, the 13ЧП uses a lever (anchor) escapement, better suited to the vibration and movement encountered aboard an aircraft
** From the David Read Collection
