Ref: 07.0050.141 E, "Marine Chronometer"Large, silver deck chronometer watch with power reserve and moon phasesMade circa 1990. Accompanied by the original box, Guarantee and bookletDIAM: 60 mmNote: in very good condition, as New; this movement, which was originally released by Zenith in the mid 1950’s, was actually considered to be the most precise movement in the world in its category and is still considered one of the finest movements available.