de rosa maintained his business as a small, family run custom fabricator well after the introduction of his microfusion italia investment cast lugset(late 1979).
he was the sole builder of all de rosa framesets until sometime around 1982/83 when his eldest son, danilo was first enlisted for production duties, initially doing the mitering and eventually brazing up the main triangle tubes. doriano & christiano became more involved soon afterwards for similar duties. during this period, ugo alone fabricated and installed all rear triangle assemblies as well as constructed the forks for each and every frameset until after the business moved out of the old 'bunker' and into the current factory location around 1987(?) at which point the company expanded to include a handful of production staff members from outside his immediate family.

1985 article from 'winning'- gratefully stolen from 43 bikes.com