Wow, ten years after my own question I can say that these transparencies were indeed used for glossy magazine features. However i have been told that these 8x10's are in itself processed from original 5x4 or 3x4 transparencies. Value wise it is like all things wonderful: depending on condition and desirability. These transparencies do have a small group of collectors, Topaz is not a very desirable title, but the big H himself is.
Wim