The Serengeti 6543 Envoy is a classic late-1990s/early-2000s Serengeti model from the Corning/Bollé era. It was designed as a medium-sized lifestyle/driving sunglass rather than a heavy wrap sport frame.

Specifications

• Brand: Serengeti
• Model: Envoy
• Model Number: 6543
• Style: Classic rectangular / navigator
• Gender: Men's (fits many women as well)
• Made in: Japan (RARE - earlier manufacturing runs)
• Lens: Corning Optics mineral glass, photochromic Drivers® 
• Features:
  • Photochromic glass lenses
  • Spectral Control® technology
  • Excellent color contrast
  • Anti-reflective rear coating
  • 100% UV protection

Serengeti built its reputation on its mineral glass lenses, which are still regarded as some of the best driving lenses ever produced. They automatically darken and lighten with ambient light and enhance contrast without the overly dark appearance of many polarized lenses.

Measurements

The factory specifications for the Envoy are:

• Lens Width: 56 mm
• Bridge Width: 17 mm
• Temple Length: 140 mm