Letter sealPaper seal stamps were formerly used to seal letters from authorities, communities, companies and upper-class individuals. Envelopes were still unknown at the time. Most seal stamps emerged from around 1850 up to World War I. To making savings, later only a stamp was used or the seal was imprinted on the envelope or writing paper.
Poster stampsFrom the seal stamp prototype, the first poster stamps subsequently emerged from around 1860, which were initially used to publicise various exhibitions. This was followed by advertising for products of companies. Around 1900, many thousand collectors were thrilled at the comprehensive scope of collectable seal and poster stamps. There were some collectors’ newspapers as well as numerous clubs dedicated to stamps. An exhibition of these stamps took place in 1913 in the Berlin KdW department store (Kaufhaus des Westens) and was a huge hit.