Little known (to me at least!) Italian frame builder Diego Vitali. His workshop was placed close to Ravenna (Emilia Romagna) in the north-east of Italy.
In the past he was a mechanic and framebuilder of Felice Gimondi from '68 to '73.
He also built a lot of frames for Vicini and other bigger italian Brands and he was really good in TIG welding.