Patek Philippe makes only 170 Tiffany blue watchesThe New York Times 12/06/2021
Patek Phillippe has made 170 Ref. 5711 watches to celebrate its 170 years doing business with Tiffany. The face of the timepieces is in Tiffany blue and the watches are expected to significantly appreciate in value. Waiting lists for this particular model go back as far as 10 years.