A Collector’s Guide to the Patek Philippe Ref. 3970 Perpetual Calendar Chronograph
Imagine you’re a watch collector in 2000, on the hunt for the ultimate vintage Patek Philippe: a ref. 2499 perpetual calendar chronograph, made from 1951 until 1985. After an exhaustive search, you end up with a ref. 2499 from the 1960s. At about 40 years old, there’s no denying it’s a real, vintage Patek Philippe. … Continued