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Patek Philippe launches a new Calatrava with instantaneous day-date displays and an eight-day power reserve.
The new manually wound 31-505 8J PS IRM CI J calibre combines a classic construction with several technical innovations, including a Pulsomax® escapement in Silinvar®. The two series-coupled barrels guarantee perfectly accurate operation for a full eight days, with a ninth “reserve” day displayed in red on the indicator. The day-date displays jump instantaneously at midnight.
The entire circumference of the white gold caseband is adorned with Patek Philippe's emblematic hobnail pattern.
| Brand | Patek Philippe | 
| Collection | Complications | 
| Model Number | 5328G-001 | 
| Case Diameter | Diameter: 41 mm. Thickness: 10.52 mm. | 
| Case Material | White Gold | 
| Strap Material | Calfskin, fabric pattern, navy blue (originally fitted). Calfskin, grained, taupe (additional strap). White gold patented triple-blade fold-over clasp. | 
| Dial | 
 Textured blue with black-gradient rim, white gold applied numerals with white luminescent coating. 
 | 
| Warranty | 5 years | 
| Water Resistance | 30m | 
| Movement | 
 Manually wound mechanical movement. Calibre 31‑505 8J PS IRM CI J. Instantaneous date by hand. Instantaneous day in an aperture. Power reserve indication. Small seconds. 
 | 
| Gem set | No | 
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