Functionally, if you are familiar with the Frederique Constant Worldtimer, https://www.pnhwx.co.uk this variant is no different. The raised world map motif on https://www.pnhwx.co.uk the textured blue dial remains, as does the date counter complication via a subdial at six o'clock, done in a https://www.ctrwx.co.uk sunray guilloché pattern. The 24-hour day-night wheel is illustrated by the use of red for day, and grey for night, and it corresponds with the cities adorning the city wheel which is done in blue, matching the rest of the dial.