rdenney
363
Old Zenith movements seem to survive the ages well.
The Zenith EP movement in this Ebel (who called it a 134) is the caliber 40.0, which Rössler writes was made only in 1986. After 33 years, it runs perfectly and keeps time up to current standards. 
Alas, not the full-calendar version of the movement. Ebel was reportedly the first, however, to install a Dubois-Dépraz perpetual-calendar module on the El Primero.
—Rick
Old Zenith movements seem to survive the ages well.
The Zenith EP movement in this Ebel (who called it a 134) is the caliber 40.0, which Rössler writes was made only in 1986. After 33 years, it runs perfectly and keeps time up to current standards. Alas, not the full-calendar version of the movement. Ebel ...
