This is very expired film, produced in the GDR - in this case expired in 19...
Recipes & dev times using Film ORWO NP20 80
ORWO NP20 80 at 64 in Adox Adonal 1:40
11 minutes at 20°C/68.0°F
ORWO NP20 80 in Adox Adonal 1:50
10 minutes at 20°C/68.0°F
3 recipes in total