[Neurohirurg]

http://www.higuchi-inc.com/thecitizen.html
A660/High Accuracy +-5SEC/year

http://c-watch.co.jp/ww/sbgt019sbgx009.html
# Quartz movement 9F83
# +/-10seconds/year

http://www.credor.com/lineup/node/re...z/gcat992.html
Cal.8J80
+/-10seconds/year

Часы же с радиосинхронизацией не победить никому.