At the age of 12 Bruno Rossati began working eleven hour days.
"Now, approaching 91, I find myself reminiscing about my youth, still riding my motorcycle every day.
Letter re Ladetto
According to Wikipedia NL the Harlette was built as a 123cc and 173cc two-stroke at the Puch factory in Austria for Harley-Davidson importers in France, Italy and Belgium and were produced from 1925 to 1928, and that in France they were also sold as Harlette-Géco because they were sold to Gerkinet & Co. in Jeumont.
However, Bretti Brothers differ somewhat, telling us that MAS produced the Harlette as a fourstroke in 1930. Further information here: MAS Harlette
Sources: wikipedia.nl, Bretti Brothers, Tragatsch p155.