The complete set in detail
ES50AB
SG No. EO295B
1957 - Official stamp, compass : Background lined and arc project at right, watermark 'DDR and flowers', on granit paper, perforated 14 - 5 Pfg. ; yellow-green
ES50BB
SG No. EO296B
1957 - Official stamp, compass : Background lined and arc project at right, watermark 'DDR and flowers', on granit paper, perforated 14 - 10 Pfg. ; blue-green
ES50CB
SG No. EO297B
1957 - Official stamp, compass : Background lined and arc project at right, watermark 'DDR and flowers', on granit paper, perforated 14 - 15 Pfg. ; dark violet
ES50DB
SG No. EO298B
1957 - Official stamp, compass : Background lined and arc project at right, watermark 'DDR and flowers', on granit paper, perforated 14 - 20 Pfg. ; olive-green