SJX,
Don't go on to tell everybody about Cartier CPCP watches; it's meant to be a secret pleasure for discerning collectors 
Louis Cartier (1875-1942) is credited with creating the first man's wristwatch in 1904 for his Brazilian friend and client, aviator Alberto Santos-Dumont (1873-1932) because pocket watches are difficult to use in a busy cockpit and even positively dangerous. Even in those days, there was some exclusivity to the private collection; the general public did not get their mitts on a 'Santos' watch until 1911. By that year, Louis Cartier had started production of early wristwatches at the Rue de la Paix workshops with the help of another famous name in horology - Edmond Jaegar.
The best thing about modern CPCP range is that both ladies and gentlemen can share the same watches even if on deployant clasp. The unique Cartier deployant clasp (thanks to Monsieur Jaegar) is 'infinitely adjustable' because there are no holes punched into the leather strap. The strap can be adjusted to ANY wrist size by any increment.
The current Mrs MTF and I "share" a number of CPCP watches and Cartier is one of the two brands, whose chronographs she will wear; the other being FP Journe. The Cartier Tortue Chrono Monopoussoir does not have the macho multiple pushers that many ladies do not like!
Both brands have elegant thin watches despite their movement complications. Any upstart can make complicated watches in thick cases but it takes elegant style and horological experience to do it in confined spaces.
"Watchmakers do it in confined spaces!"
Regards,
MTF