Patek Philippe 5212A- 001 Calatrava Weekly Calendar 40mm stainless steel case, light brown calfskin strap

Time, day, date, month — the basic temporal measurements and functionality upon which watchmaking has been based since, well, time immemorial. Patek’s new high-end 5212A, however, goes one better by adding an additional refinement to its information display by keeping track of the weeks in a year. Beyond the three standard hands for seconds, minutes and hours, two red-tipped hammer pointers register the day and the week number (the latter also cleverly indicates the relevant month on a concentric outer scale). Design afficionados should note the technical lettering on the face is based on the actual handwriting of a Patek designer; a handsome and human detail on such an exquisite and captivating complication. BF £25,610; patek.com