HEUER CARRERA VINTAGE MENS CHRONO 3648S GP S. AS IS PARTS REPAIRS OR PROJECT. HEUER CARRERA 3648S CHRONOGRAPH PARTS/REPAIRS. 100% AUTHENTIC HEUER WATCH IN PROJECT CONDITION. There is some scuffing on the crystal, the dial can be seen clearly. There is pitting on the case and the gold plating is worn in a few places….