Peter, there are also a lot of photos of the NSU Hammocks in this directory:
Index of /graphics/NSU
The Guzzi GP singles are my most favorite race bike. Ing. Carcano honed every single part on them to a keen edge. They weren't the most powerful but they were often the fastest bikes on the track -- good handling, good aeros, good brakes, light weight, etc.
cheers,
Michael