I googled an historic car site. The text said the 503 was essentially an incremental update of the 501, and some of the early 503's had grillwork similar to the 501.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.
