SW
It varies with model and type, and within the same model it varies with wieght.
Based on my 737 experience wich is limited to -800 only IŽd tell u that Vclean is around 195-210 kts normally. I dont know about the other models but for an -800, 190 would be flap 1 speed for normal weights (55-65t)
Hope that helps / Duece