I would recommend trying to get hold of 'Wristwatch Chronometers' by Fritz Von Osterhausen. It covers the process of testing for chronometer status and contains info about many different chronometer calibres and watches.
Hello, Was recently reading an article on the Zenith 135-O movement and was interested in finding out about other great vintage chronometre movements. Would be really interested to learn some more about this. Thanks Best Regards, Rahul
this one is written by Dr Muller on the Longines Cal 360... one from Monochrome on the Zenith Cal 135 Manually wound chronometers are fascinating...good luck with your learning. Best, mahesh.,
I would recommend trying to get hold of 'Wristwatch Chronometers' by Fritz Von Osterhausen. It covers the process of testing for chronometer status and contains info about many different chronometer calibres and watches. Regards, Baruch