I guessed at 6 minutes as the only time I found for Microphen was for Adox CH...
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Ilford Delta 3200 at 1600 in Ilford Ilfotec DD-X 1:4
8 minutes, 45 seconds at 19°C/66.2°F
Kodak T-Max 100 in Foma Fomadon R09 1:40
10 minutes
Ilford Pan F+ 50 in Agfa Rodinal 1:100
1 hour (Stand developed)
Fuji Neopan 1600 in Kodak XTOL 1:3
8 minutes, 30 seconds