Bob Dylan sported a pair of RE Aviator sunglasses in May 2012 while receiving his Medal of Freedom from president Barack Obama. 

The RE (Randolph Engineering) Aviator worn by Dylan have the bayonet temples, which are designed to fit comfortably under headgear. Bob Dylan received the Medal of Freedom, America's highest civilian honor, for the great work he has done in America and worldwide. Dylan kept his RE sunglasses on during the whole ceremony.

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Different special editions, sizes, colors and temple-styles are available at Randolph.

Randolph is an independent, authentic American eyewear brand since 1973. Randolph sunglasses, designed and handcrafted in Randolph, MA, can often be spotted in films and tv series.

In the picture we can also see that President Obama still wears his trusted Jorg Gray watch.

RE Aviator
There are countless aviator styles out there, but only one Randolph Engineering. Built for the U.S. Military, the RE Aviator surpassed their rigid specifications standards. When NASA Astronauts lift off the launch pad, or when America’s top gun pilots step into the cockpit, Randolph Engineering provides the priceless pair of sunglasses that helps them safely navigate the skies. See more Randolph Engineering sightings here.

Reference: Randolph Engineering Aviator, matte chrome, bayonet arms