Quote Originally Posted by Omegamanic
OK, I'm after real life experience of quartz and accuracy. I have just bought my first Chronometer quartz but understand that Citizen are the world leader in accuracy and charge up to $8k for one of the super accurate models. Seiko's 9F is also rated as super accurate - has anyone timed one, or are they just too accurate to keep track of a few seconds or so over 12 months?
There are quite a number of reports at WUS HAQ - generally the 5 seconds/year models from Citizen and Seiko are considered to be the top level of self-accuracy still in production. There was a Citizen Crystron Mega which was claimed to be around 3 seconds/year but I have very serious doubts about maintaining that performance. Even today the accuracy performance is subject to 'aging', and even in very high end models a recalibration might be needed after like 5-10 years (which can be easier done in some HAQ Swiss models but very few models from JP, where you need to send the watch back to the manufacturer :roll: ).