Special stamp booklets 6 dfbz II1 cancel with two lines in red and handwritten change of contribution in red on cover side 1 as well date stamp 5.6.79 PRORA, content Michel number 1913, mint never hinged, rare, Richter 480.- booklet with postmarks and changes in contributions were from booklet the mostly qualitatively inferior waren produced, due to the qualitative restrictions received these therefore stamp or handwritten entries, they were on the Post offices and Rügen and on postal offices the National people's Army sold.