Solve label Sweden

Sweden's postage due stamps did not have a long lifespan. The series of postage due stamps appeared from January 1, 1874, and featured a simple design consisting of numbers within a border and the word LÖSEN (Postage). In addition to numbers, the value was also expressed in letters.

The designer of the stamps is uncertain, but some catalogues mention PO Bagge. The first series was printed using letterpress, and the postage due stamps had perforations of 14 x 14. In 1877, a reprint of the series appeared, also in letterpress, but with perforations of 13 x 13. The stamps were printed in a single colour, except for the 1 Kr. value, which was printed in two colours. Unfortunately, I do not have an example of that, but I do have one that was printed in the same way. It is a service stamp, in which the design is divided diagonally into a blue top and a brown bottom. The print runs of the second series were much larger than those of the first series. The stamps are generally poorly centered, and the printing of the two colors of the 1 Kr. was not always perfectly aligned either. Sweden's postage due stamps were abolished effective January 1, 1892. Instead, ordinary franking stamps were used as postage due stamps, which were stamped with the text: 'Lösen betald' or 'erlagd'. Subsequently, impressions of the standard date stamps were used. The only distinguishing feature on a piece of mail is the letter T. An aniline pencil was also sometimes used to cancel the stamp. Soon thereafter, green labels were manufactured that had to be affixed to indicate that postage was due because of insufficient franking. The amount of postage to be paid then had to be written on these labels in pen. As an example, an envelope from 1966 that was not stamped and bore such a label. Later, labels with a pre-printed value also appeared. Here is an example of this from 1980 as well. On the letter from Italy, it was indicated by two numbers separated by a hyphen, alongside an imprint of the letter T for tax, that the letter was insufficiently franked. The recipient of the letter had to pay 115 öre. The specialty collector knows about 10 different labels. I call them labels, or are they postage due stamps after all?