The above photograph shows a standard Boehm piccolo (down to D) together with a simialr piccolo dow to C.
These were taken from an old British Flute Makers Guild Catalogue.
They no longer make the piccolo down to C.
The above photograph and notes are as accurate as my knowledge of the subject permits
If anything above is factually incorrect, or if anyone can usefully improve or add to the above notes then please feel free to email me at john@fluteweb.net