Passage: The Tourbillon movement was developed over a period of three years.  Resulting from this research is the calibre 600P, the thinnest tourbillon movement in the world (3.5 mm). Its frame is composed of 42 minuscule parts, including three titanium bridges, it weighs just 0.2 grams. The flying tourbillon – mounted on a single axis – is topped by the initial “P”, which adds to the complexity of the poising.

Question: The lightest tourbillon movement weighs how much?
0.2 grams