Dump with special characters in table column name
I tried renaming the table via "adminer" (php mysql manager) but even there the table name was not correct (not showing at all, to be honest). I tried renaming but of course I produced a new table column.

In the end I had to recreate the table.

I managed to get most of the schema from the SHOW CREATE TABLE contabilita_banche\G above. 
Then I took the dump with the data, adjusted the CREATE TABLE command with a utf-8 column name and restored the new dump.

Thank you very much Rolando for your support!