International letter with perfin “K/LL/F.” in the stamp. The letter is franked correctly with 30 øre, which was the rate for international letters from November 1st 1925 to December 31th 1926. The stamp is cancelled November 6th 1926 with a whole letter cancelation machine Tp. SP. 4B. Bro V København K. This letter is the only known with this perfin and it’s also the earliest known date of use.