Though making a resonance watch is very difficult, the basic principle is straightforward, and it would seem that there is nothing left to improve on in the implementation of the Breguet resonance principle in a wristwatch as developed by F.P. Journe. However, F.P. Journe has not been content link to leave well enough alone, and the 2020 version link of link the Chronometre a Resonance introduces not only greater complexity, but greater refinement in the search for precision as well.