AUDEMARS PIGUET Royal Oak Perpetual Calendar 25820SP – Steel and Platinum – White Dial – Full Set

AUDEMARS PIGUET ROYAL OAK PERPETUAL CALENDAR REFERENCE 25820SP

The introduction of Audemars Piguet's Royal Oak model marked the beginning of the sports watch trend we know today. In 1972 it was presented at the Basel Fair and turned out to be the most expensive steel watch that had ever been announced.
The interesting and in some ways nice aspect is that, even today, the Audemars Piguet brand is mainly known for its Royal Oak models, which were not considered at the time of the first presentation.
With the reference 25820SP the brand merges two of the Maison's main creations, the Perpetual Calendar complication and the Royal Oak model.
This Audemars Piguet model reference 25820SP has the following features:

Case and bracelet in steel and platinum
White Tapisserie dial
Sapphire crystal case back
Perpetual Calendar Complication