Domestic letter with perfin “S.K.” in the stamp. The letter is franked correctly with 20 øre, which was the rate for domestic letters in the period from March 1st 1921 to December 31th 1926. The stamp is cancelled January 14th 1926 with a whole letter cancellation machine Tp. SP. 4B. Bro II Aabenrå * Anthon Bundgaard was the Director of “Det Sønderjyske Kompagni” and this letter is marked as “private”.