Patek Philippe 2508J water resistant screw down back Calatrava watch features a 35mm. Calatrava Iconic style 18K yellow gold 2-body case. The watch has the original factory dial with raised applied gold indexes,  Dauphine hands, and a black sweep center seconds hand with a minute track.  Further with a  Patek alligator strap with original 18K yellow gold Patek buckle. 

Date & Paperwork: 
The watch was made in 1952, 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:  Considered by many to be among the pinnacles of Patek Philippe's mid-20th century design, the reference 2508 distinguishes itself from its "time-only" brethren with a uniquely balanced case design. The 2508 was Patek Philippe's first foray into waterproof case designs for non-complicated wristwatches. Previously, the only waterproof wristwatch was the reference 1463 chronograph, from which the 2508 would borrow the entirety of its form. The downturn lugs, perfectly proportioned dial, and screw-back case profile produce a masculine and most pleasing wrist presence not found in other Calatrava's. The 2508 could be considered a successor to the legendary reference 570, though with a "sportier" feel, and forerunner to "A magnetic" references due to its "double case-back" design. Inside the 2508 beats the legendary 27SC, covered by a metal dust cap to keep moisture and magnetism at bay - a trait found predominantly in "tool" watches, making this reference a unique offering in Patek Philippe's lineage

Specifications: 
Reference Number: 2508J
Year: 1952
Movement: Manual, 27 SC Caliber 
Case Diameter: 35mm
Dial: Silvered White
Band Type: Alligator Strap 
Features: Screw Back (Water Resistant)
Thickness: 10mm