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ID-20 Ilford "Universal" Developer

Metol 3 g  
Sodium Sulphite (anh) 50 g  
Hydroquinone 12 g  
Sodium Carbonate (anh) 60 g  
Potassium Bromide 4 g  
Water toWater to 1 litre  

To use: Photographic papers - Dilute 1+ 3 (can be 1+2 or 1+1 for higher contrast)

ID-62 is the modern PQ variant of this formula
ID-20 was once commercially available in powdered form , and in the 1950's/60's Ilford sold an ID-20 PQ powdered version.