The car is a genuine 1955 Dyna Z1. The Panhard Dyna Z is a lightweight motor car produced by Panhard of France from 1954 to 1959. It was first presented to the press at a Paris restaurant named “Les Ambassadeurs” on 17 June 1953 and went into production the following year. In 1959 it was replaced by the Panhard PL.
This first series Z1 car has an aluminium body on steel subframes. Later cars have steel bodies and carry a weight penalty.
The motor is this car is not original. It is a later PL unit with a more robust and powerful engine.