This pre-owned Zenith El Primero Tourbillon 18.2050.4035/01.C713 watch is in very good condition. During our quality control check, any necessary adjustments are made to ensure the watch is functioning as intended. The watch is Crown & Caliber Certified Authentic and comes backed by our 1-year warranty. Pre-Owned Watch. Own this beautiful Zenith El Primero Tourbillon watch featuring its most famous El Primero movement. This beautiful watch has a 18k Rose Gold Case and Brown Leather Strap with a Silver dial that displays a Tourbillon and Chronograph feature. Watch is pre owned however is in great condition and works flawlessly. Watch does not come with box or papers. SKU MW9694 (KTAJSWR)