The chronological list of the 100 "must-haves" making up The Museum Collection book features an obvious Five Stars choice at number 3. This time the excerpt taken from the text of the book includes details about the movement - an unusual French caliber powers the illustrated example.
Fathering the modern wristwatch
... Nothing is left of the prototype manufactured in 1904, apart from
its mention on the company's records. Seven years later, a wristwatch
named after the aviator became available to the brand's wealthy clients
Movement Caliber Brédillard, 22.5 mm, 18 jewels, cut bimetallic balance wheel, Breguet hairspring, 18,000 vibrations per hour.