Audemars Piguet Royal Oak 26240OR Selfwinding Chronograph “50th Anniversary” – Blue Dial – Unworn
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.