Caliber A restored early 1950s Zenith Caliber 135-O each example previously placed
link first in various
link Observatory chronometer competitions in NeuchâtelFunctions
link Hours minutes secondsDiameter 30mmThickness 5mmPower Reserve 40 hoursWinding ManualFrequency 2.5 Hz 18000 vphJewels 19Additional Details Restoration by Kari Voutilainen