The Dior 2 label appears HERE, but Indicates it a line for items other than clothing. I don't know if that label was also used for clothing at some other time.
http://forums.vintagefashionguild.o...lp-me-date-this-dior-dress.58263/#post-581466 If you read the above thread, there is info about this label.. There are threads in the forums about this label. According to this thread, it was used between 1987 and 1996.