Domestic letter with perfin "N.K.K." in the stamp. The letter is franked correctly with 15 øre, which was the rate [...]

Domestic letter with perfin "N.K.K." in the stamp. The letter is franked correctly with 15 øre, which was the rate [...]
Domestic letter with perfin "F.A.&Co" in the stamp. The letter is franked correctly with 50 øre, which was the rate [...]
Domestic letter with perfin "N.K.K." in the stamp. The letter is franked correctly as printed matter with 4 øre, which [...]
Domestic letter with perfin "L. F. M." in the stamps. The letter is franked correctly with 10 øre, which was [...]