A. Lange & Sohne Dufour Datograph 403.031. This Datograph has receive high praise (and wear) from one of the worlds greatest living watchmakers, Philippe Dufour. @hodinkee wrote about the watch, The pink gold Datograph with black dial that is Dufours daily wear watch is so strongly associated with him that its often referred to as the Dufour Datograph. Dufours enthusiasm for A. Lange & Sohne is well known hes often gone on record as saying that in his view, in a world generally trending towards mediocrity, Lange remains an island of genuine devotion to the time-consuming art of really finishing a movement properly, without cutting corners in any aspect of either finish or precision.