Reference 3230 is a very elusive model in Breguet history. Identical in terms of design and case size to its twin reference 3237, it seems from Breguet archives that the reference 3230 was used as common model number for very early Classique chronographs with solid and display casebacks, while reference 3237 was later introduced specifically to designate those timepieces with display casebacks. The Classique chronograph 3230/3237 was one of the first iconic models introduced after the rebirth of Breguet under the Chaumet Brothers and master watchmaker Daniel Roth.