With apologies for butting in, but I have an urgent philatelic question!
I was working on the database of Jorge aka Giorgio Nicastro, who engraved a number of stamps for Argentina, and I was wondering whether it is true that he started off signing his stamps with G. Nicastro, see for example this 1966 stamp,
and later used to sign off with J. Nicastro, as on this 1979 stamp (on the right),
or were there maybe two Nicastro's at work? I believe there was only one Nicastro working as an engraver at the time, but I would like confirmation of that! It would make sense, because he started out life as the Italian Giorgio and ended up as the Argentine (Argentinian?) Jorge.
Does anyone know for certain?