Regarding engine production at Fiat.
"The engine was also produced under license in Italy by FIAT from 1942. The first examples retained the original name DB 605, whereas those produced from 1943 were renamed FIAT RA 1050 RC 58I Tifone,
for a total production of nearly 1750 exemples, mainly used in the fighter aircrafts FIAT G. 55, Macchi C. 205 and Reggiane Re 2005."
Source:
https://www.museomotori.unipa.it/sch...?id=26&lang=en