Tory Jeffery (who also is the film's make-up artist) plays the antique dealer, not the "pawnshop man" indicated in the film's credits.
About half of the performers credited do not appear in this film. They do appear in the sequel Casanova II (1982).
Actress Mimi Morgan (as Mimi McCoy) is credited as "cosmetic girl" while actress Mary Grant is credited as "official's aide". It should have been the other way around. Morgan's scene has been moved to Casanova II (1982) and she plays the government official's aide. Grant's scene (as the cosmetic girl) was replaced in Casanova II by archive footage.