Per Vintage Fashion Guild: The label Pierre d’Alby was one of the first players in France to become part of the explosive 1960s scene. The label was created by Zyga Pianko in 1958 and a very young Daniel Hetcher was hired to design the first six collections. Other well known designers such as Agnès B, Jean-Charles de Castelbajac, Feycal Amor, and Nicole Fahri designed for the label.
In the 1990s the company changed its name to Zyga, in honour of its creator.
The coat is equivalent to a modern size 2