Business Officer Diamond 

A world timer which uniquely lets you set the time zones via the bezel.  Displaying 24 important world wide cities. All destinations are subject to daylight saving. A black dial set with 60 black and 60 white diamonds symbolising day and night. Each city that uses daylight saving has a diamond in the bezel. The time zone lever is also set with 183 diamonds 1.3 carats. The watch comes on a black alligator leather strap.

Reference: V DD 1131