Image: OMC ships clock

Description: Omega Constellation Megaquartz F4.19mhz ships clock, French Navy issued. The calibre 1525 movement uses an advanced 4.19 MHz quartz resonator operated at 223 or 4,194,304 Hz frequency giving an accuracy of less than ± 5 seconds per year. The clock was designed at the request of the French Navy. This ships clock was available commercially at great expense but was predominantly used for military application with the French Navy, who used the Marine Chronometer clock in the majority of their fleet. The clock was supplied in a mahogany box with brass fitting and was very much a case of function over form and built to the highest of military specifications including anti magnetic shielding. The clocks were all individually numbered on a brass plaque and ran on 2 AA type batteries, three of which ran the clock and a fourth was used as a back up power source when changing the other batteries and standard running time for a set of batteries was circa 3 years.
Title: OMC ships clock
Credit: Own work
Author: Omega-collector
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes