Very classic Patek Calatrava 3569 with back-wound Cal 350 movement in very good condition, wifh a recent service. These watches speak volumes of how perfect the simplest 3-hand automatic watch can be. The rear screw was replaced with an other 18k gold from a 350 Caliber. 
 
Details:
 
Brand: Patek Philippe
Model: Calatrava
Reference: 3569
Year: 1970
Material: 18k Yellow Gold
Dimensions:  36mm
Crystal:  Plexiglass Crystal
Movement: Automatic Cal 350
Bracelet/Strap: Aftermarket band and buckle
Box/Papers: No/No