Autavia 2446 — GMT, Second Execution Screw-Back Case

Heuer’s first GMT chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display.: a red-tipped 24-hour hand and red/blue 24-hour bezelBezelThe frame surrounding the crystal at the front of a watch. (even numerals) on a three-register dial with luminous applied markersApplied hour markersNumerals or hour markers attached above the dial surface, often by riveting. Applied describes their construction; it does not identify the metal or establish the originality of a vintage dial. A maker’s use of gold for its own markers should not be assumed for other brands., in the second-execution screw-back case.