Domestic letter with perfin Logo in the stamp. The letter is franked correctly with 30 øre, which was the rate [...]

Domestic letter with perfin Logo in the stamp. The letter is franked correctly with 30 øre, which was the rate [...]
Domestic letter with perfin "LB" in the stamps. The letter is franked correctly with 60 øre, which was the rate [...]
Domestic letter with perfin "P&A" in the stamps. The letter is franked correctly with 3 x 100 + 50 øre [...]
Domestic letter with perfin "I.K." in the stamp. The letter is franked correctly with 35 øre, which was the rate [...]