The Rolex GMT-Master 1675 of a senior investigator with the National Transportation Safety Board is for sale.

Robert Benzon bought the watch in 1973 after he had returned from Vietnam, having flown combat missions as an Air Force pilot. He flew KC-135 Stratotankers in the U.S. and Europe while wearing the GMT-Master before joining the NTSB, in 1984.

Benzon handled more than 30 major inquiries, including high-profile cases like the explosion of TWA 800 or “the Miracle on the Hudson” US Airways 1549, advancing aviation safety for millions of travelers worldwide. He is widely considered to be among the best in his field and was eulogized in Congress.

The 1971 GMT is for sale by Grey and Patina and comes with the original box and papers that show Robert Benzon’s name on the certificate.