The Longines Spirit Zulu Time L38024606 is a 39 mm stainless steel GMT watch built with a bidirectional bezel and a ceramic insert. The anthracite dial features applied Arabic numerals filled with Swiss Super LumiNova and polished hands that maintain the aviation inspired layout of the Spirit line. A central GMT hand tracks a second time zone using the 24 hour scale, and a date window sits at six. The watch is powered by the Longines Calibre L844.4, an automatic movement with a silicon balance spring, magnetic resistance and a 72 Hours power reserve. The movement is COSC certified. A screw in crown and a 13.50 mm case height support its 100 meter water resistance, and the 46.80 mm lug to lug length keeps the proportions balanced on the wrist. The stainless steel bracelet is secured by a folding clasp.