In-Depth: The Long And Increasingly Complicated Story Of The Reference Number

Two vintage Breitling catalogs: In Switzerland, the Navitimer was reference 806.

Meanwhile, the U.S. distributor developed its own numbering system without concern for the Swiss convention – the Navitimer is ref. 9113.

A 1970s Rolex catalog, originally published on Rolex Forums.


CNC machine at Montblanc Minerva in Villeret.

