This is a c. 1970 Heuer Autavia 2446C GMT Manual Chronograph with amazing, authentic patina.  Excellent vintage example of the first GMT chronograph ever madeAll original parts Original faded "Pepsi" bezel with new old stock, correct replacement crystal100% original, untouched hands, dial and sub-dials with amazing patinaUnpolished case shows typical wearPurchased from Awad Watches in Miami, FL in June 2020, see https://awadwatches.com/product/1968-vintage-heuer-autavia-2446c-gmt-chronograph-heavy-patina-incredible-example/)Last serviced by Whittle's Watch Works in Wayne, PA in May 202117-jewel Heuer Leonidas movement and functions all work properly and keep accurate timeNew old stock, correct Heuer leather racing strap with Heuer-branded stainless buckle