The distinctive large turn signal lenses adopted in the Ferrari 365 GT4/BB, a model that helped spark the supercar boom, were also used for its successor, the 512 BB, and were unified with orange lenses.
These lenses were kept by a 512 BB owner as spares.
The SIEM logo and other markings on the lens suggest that it is an original part, but it is unclear whether it is a reproduction or not, as the owner himself acquired them almost 15 years ago.
The lenses are also believed to be used, as there are traces of caulking around the lens, but there are no large stone chips, and are in generally good condition.