Exposure was estimated 5 minutes, just a little bit underexposed I think, but...
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Ilford P4 Surv. 400 in Calbe A 49 1:1
20 minutes at 20°C/68.0°F
Kodak T-Max 400 in Adox Adolux APH 09 1:100
2 hours (Stand developed) at 20°C/68.0°F
Ilford P4 Surv. 400 in Calbe A 49 stock
5 minutes, 30 seconds at 23°C/73.4°F
Ilford P4 Surv. 400 in Calbe A 49 1:1
12 minutes, 30 seconds at 22°C/71.6°F