Among the models we are highlighting there are two movements responsible for this impressive functionality. The Caliber 240 HU, and the CH 28-520 HU which integrates the World Time complication with chronograph functions. Each watch displays its movement through a sapphire crystal case back, and each case offers 30m of water-resistance for peace of mind. Despite the amount of information on display, each dial is carefully laid out to prioritise legibility. To this end, decoration is kept to centre of the dial, and the 24-hour rotating disc is split into two colours to indicate day and night, with delicate sun and moon symbols at noon and midnight.
The essence of the Patek Philippe World Time is contained in the Ref. 5230P-001. The Ref. 5230 was first introduced in 2016, and this model interprets this timepiece in platinum. The dial is a deep blue, the 24-hour disc partitioned into white and blue to indicate day/night zones. A hand-guilloché pattern adorns the centre, creating visual interest without crowding the dial. At 38.5mm in diameter, this watch sits neatly on the wrist, completed by a blue calfskin strap.