International letter with perfin "APM" in the stamp. The letter is franked with 7 øre, which was the rate for [...]

International letter with perfin "APM" in the stamp. The letter is franked with 7 øre, which was the rate for [...]
International letter with perfin "APM" in the stamp. The letter is franked correctly with 5 x 8 øre = 40 [...]
International letter with perfin "APM" in the stamp. The letter is franked with 90 øre, which was the rate for [...]
International letter send from Grenå to staff onboard Rømø Maersk c/o A. P. Møller, Copenhagen. Franked as International letter in [...]