Patek Philippe Annual Calendar Aviation offering a 39mm case diameter

offering a 39mm case diameter while retaining the GMT functionality of it larger sibling

both professional and military

1 movement within — which is thankfully visible through a sapphire display caseback

the Swiss watch industry was an interconnected one

Elegant and unassuming yet boasting a unique and beautiful dial

Patek Philippe Annual Calendar Aviation offering a 39mm case diameterIn 1991, the soon to be graduates at the Geneva School of Engineering were presented with their final project prior to receiving their diploma: to simplify the perpetual calendar. Although the task was easier said than done, their work led to the inception of the annual calendar complication, patented by Patek in collaboration with the bright engineering minds at the GSE. Five years later, Patek debuted the Reference 5035, the worlds first ever annual