Extremely rare Aurora Duplex senior size in black and bronze celluloid. This model with ornated clip and decorative filigree cap band was the top of the range for Aurora in the late 1920's/early 1930's.
The Duplex series represents one of the best Italian interpretations of the flat top-Duofold style era. The standard models had no decorative cap band while the most exclusive line was enriched with the beautiful filigree decoration.
I enclose a copy of an Aurora catalogue, where you can see the standard models (sorry for the bad quality of the image). The red pencil in the picture, has the same kind of decoration and this model.