You are right is an old strain from the late 70's. I think it came from the cross of Dutch passion called Purple #1 and the Original Haze. Yes it is purple in color and very stony with good trichome size.

Not sure if it's still around anymore. If you fine some let me know it's a good indoor strain because is close to a 50/50 mix. Yield is average but the color is very appealing.