It is an individual full of French metamorphosis called Skull among experts.
An avant-garde design that would probably have been supported only by some people even at that time
However, it is a frame that emits a frightening aura when the person who suits it holds it.
The caulking pin of the hinge is carefully shaved and finished flat.
(It is also a detail that cannot be reproduced in modern eyewear making.)
Compared to the skull that is stocked with the same design, the lower part of the front is cut differently, making it a little more mature! ? I have the impression.
