Rolex Daytona 116520 "Panna" dials were produced between 2000 and 2004. 

These rare, cream-colored ("panna" means cream in Italian) dials were not intentionally designed this way. Instead, a chemical imperfection in the clear varnish used during the first few years of the reference 116520's production causes the originally crisp-white dials to naturally discolor into an ivory or creamy hue over time when exposed to sunlight. 

Because Rolex quickly corrected the varnish defect, the Panna effect is strictly confined to specific early serial number ranges: 

• P-Series (Circa 2000)
• K-Series (Circa 2001–2002)
• Y-Series (Circa 2002–2003)
• F-Series (Occasionally seen in very early 2004 examples)