To innovate when it comes to women’s watches is a tricky thing. When designing a man’s watch, you can play with materials, complications, even tell the time using fluid technology if you want, but there are more constraints when it comes to timepieces for the fairer sex. Which is why Richard Mille is so constantly surprising. Its latest launch, the RM 07-02, had a case made entirely from sapphire glass, which required 40 days of manufacturing, while the year before its RM 19-02 had a tourbillon housed in a flower automaton. It has even created a movement featuring a skeletonised plate of micro-blasted gold set with diamonds. richardmille.com