This is the Veloce manual F42/3R covering the overhead cam models from 1925 - 1931. In practice it is a mixture of instruction book and parts manual, as several pages at the back of the manual are cutaway diagrams annotated with part numbers, although this only covers the engine, gearbox and rear hub.
As with other references on this site, the text has been OCR'd from a scanned source and the diagrams 'cleaned up' to remove most of the effects of aging, use and simple limitations of the print technology when the manual was originally produced. As an experiment, the manual has been formatted in a PDF document ready for A5 double-sided printing and is available from this site.