1. Audemars Piguet
This is probably the only watch maker that competes with Patek Philippe in terms of consistently producing the world’s most expensive brands.
The Royal Oak Complication has 52 jewel movements.
It has an 18 karat white gold case and bracelet.
The watch has a transparent sapphire caseback and has a perpetual calendar which indicate the day, week, month, moon phase, leap years etc.
Those brands are indeed highly demanded, being both the most traditional and most expensive watch brands in the world!