"The Patek Philippe Henry Graves Super-complication is one of the most complicated mechanical pockets watches ever created. The 18-karat gold watch has 24 complications and was assembled by Patek Philippe. It was named after banker Henry Graves Jr who commissioned it out of his desire to outdo the Grande Complication pocket watch of American automaker James Ward Packard. The two were both at the top of the watch collecting world, regularly commissioning innovative new timepieces.

It took three years to design, and another five years to manufacture the watch, which was delivered to Henry Graves on January 19, 1933. The Super-complication was the world’s most complicated mechanical timepiece for more than 50 years, with a total of 24 different functions. These included Westminster chimes, a perpetual calendar, sunrise and sunset times, and a celestial map of New York as seen from the Graves’s apartment on Fifth Avenue."

Sources:https://www.celebremagazine.world/watches-co/patek-philippe-henry-graves-supercomplication/
https://www.hodinkee.com/articles/henry-graves-supercomplication