What do the credentials "CMC" mean?

Answer: CMC stands for "Certified Master Clockmaker". This is the American Watchmakers/Clockmakers Institute's (AWCI) highest level of certification for clock restoration. Persons with this title have proven to the industry, through a series of theoretical and practical exams, that they are professionally qualified to restore clocks of all types. Visit AWCI if you'd like more information on how to become a CMC.

British Horological Institute