explain chonometer grade please
I have been wondering about the chonometer grades of the 2824 and 2892 movements. I understand there are different grades depending on the parts used and the plus or minus tolerances of time accuracy in seconds per day. My question is if one had a sw200 or eta 2824 or 2892 and they were standard grade can a watchmaker upgrade those movements with parts to chonometer? Does anyone offer that service? I am very interested. Thank you
https://www.govbergwatches.com/blog/chronometry-explained-cosc-certificate/?amp
I found that site and it has a great amount of good information on the topic. I am wondering whom among the watch makers, repair peofessional or builders is able to upgrade the 2824 or 2892 or sw200 with all of the finest parts to reach the desired -2 to 2 seconds per day that would qualify as Superlative Chonometer quality. Thank you