Special stamp booklets 10 Ibba. 2, cancel with two lines and handwritten change of contribution in blue on cover side 1, content Michel number 2478, stamps tied by date stamp \"PRORA 29.-1.80\", rare, Richter 500.- - booklet with postmarks and changes in contributions were from booklet the mostly qualitatively inferior waren produced, due to the qualitative restrictions received these therefore cancel or handwritten entries, they were on the Post offices and Ruegen and on postal offices the National people's Army sold.