The complete set in detail

E041
Sc. Nr. 85
1951 - World youth and student's festival for peace : Watermark 'flowers' - 12 Pfg. ; brown and brown-yellow / grey

E042
Sc. Nr. 86
1951 - World youth and student's festival for peace : Watermark 'flowers' - 24 Pfg. ; carmine and yellow-green / blueish

E043
Sc. Nr. 87
1951 - World youth and student's festival for peace : Watermark 'flowers' - 30 Pfg. ; green and yellow-brown / green

E044
Sc. Nr. 88
1951 - World youth and student's festival for peace : Watermark 'flowers' - 50 Pfg. ; violet-blue and carmine / blueish