Every part and every kind of Breguet 1778-1830 movements, cases and dials are noted.
George Daniels made deep research with archives and real museum/collectors examples of antique Breguet watches/clocks.
He even describes a shapes and surfaces angles of classical "Breguet" hand !
I can read it by hours..
After reading this book, it so pity to have just only one Breguet from 1820... 8)))