Domestic letter with perfin Logo in the stamp. The letter is franked correctly with 60 + 10 øre = 70 [...]

Domestic letter with perfin Logo in the stamp. The letter is franked correctly with 60 + 10 øre = 70 [...]
International letter with perfin "Ø&Co" in the stamp. The letter is franked correctly as printed matter with 10 + 10 [...]
Domestic letter with perfin "KO" in the stamp. The letter is franked correctly with 20 øre, which was the rate for [...]
Domestic post card with perfin "KO" in the stamp. The post card is franked correctly with 10 øre, which was [...]