Patek Philippe 3512 Vintage Extra Thin Classic Calatrava 31mm Watch Unisex Circa 1967

Introduction:
This Patek Philippe 3512J Calatrava extra thin watch features a 31mm case in 18K yellow gold. This example has a 175 caliber movement #1137387.  Multiple strap options are available.

Date & Paperwork: 
The watch was made in 1967, confirmed with an extract from the archives confirming its date of manufacture and further sale.  Additionally, the watch comes with a one year movement guarantee.

Essay:  
Patek Philippe launched the reference 3512 in 1964 and it was in production until circa 1977. The cases for this model were made by Antoine Gerlach and are only 5mm thick. Patek Philippe advertised this watch as their "classic extra flat watch." This model came in many variations.