The Chronomat is integral to the DNA of Breitling. Launched in 1942, the model is based on a patent document that Breitling submitted, patent number 217012, which granted protection for a rotating bezel which contained a circular slide rule. With this system, the wearer could easily perform various measurements and calculations. The Chronomat model inspired the Navitimer, which is perhaps the best-known Breitling model today.

The present watch can only be described as having a "new old stock", unpolished condition. Probably worn only once or twice, the case retains all original satin finishes to the side of the case, and razor sharp edges to the lugs. The case number is also punched deeply on the outside caseback. Opening the caseback reveals a movement that has most probably never seen any intervention or servicing within its life.

Consigned by a family member of the original owner, this watch is accompanied by its original instruction booklet, educating the wearer on how to perform a number of calculations using the circular slide rule, such as doing multiplication or division.