This is a very rare Pre-El-Primero Chronograph by Zenith, powered by a freshly serviced 146 D handwound movement. The 38mm case is in mint and absolutely unpolished condition (serial 185Dxxx). So is the original tritium dial with it´s color matching tritium handset. Natostar-crown, pushers and plexi have never been changed and are, as well as the whole piece, in mint condition. We offer this beautiful watch for sale on the original zenith/gay freres ladderbracelet.