What was the flag like before the current one, which can be considered the last official flag of your nation ?

If I'm not mistaken, I think the flag preceding the current Italian one is the flag of the Italian Social Republic https://it.wikipedia.org/wiki/File:War_flag_of_the_Italian_Social_Republic.svg

Im quite sure for finland its "leijona lippu". Used in 1917 after independence and 1920 it was abandoned.

https://en.wikipedia.org/wiki/Flag_of_Croatia#/media/File:Flag_of_Croatia_(1990).svg/2 I think this one was for Croatia, it's from 1990 shortly before the last war. Only difference is absence of a crown above the coat of arms

49‐state US flag:

A more varied pre‐US flag: