Los-Nr. 6776

"25" Postage due charge mark on unpaid transit letter sent from Helsingör January 21st 1866 via Helsingborg and Stockholm to Jacobstad (Finland). According to the Danish/swedish convention of 1865 the prepaid rate in Sweden was 17 öre but it was 25 öre when charged to the addressee. In total three letters are known to exist with this charge mark.