EL Primero Retrotimer
new line, new standard in the zenith chronograph collection
1st automatic el primero monopusher flyback chronograph
new el primero 4055 b caliber : 281 components, 31 jewels & 36'000 vph
exclusive "press and release" monopusher chronograph
available in black pvd or stainless steel 42 mm case diameter
tickness: 12.75 mm
new 2010