For the last 100 years or so, there has always been a Calatrava within the line-up of Patek Philippe watches. Starting with the Reference 96

Patek Philippe: vintage and modern – a collector's perspective
For the last 100 years or so, there has always been a Calatrava within the line-up of Patek Philippe watches. Starting with the Reference 96
For the last 100 years or so, there has always been a Calatrava within the line-up of Patek Philippe watches. Starting with the Reference 96