I just purchased this dress off ebay and it's much different than Goo described. It's tagged Made in China for Pleasant Company 1995. My initial impression was surprise because I didn't expect it to be so nice and well-made. The taffeta material is heavy and not thin at all. The differences between mine and Goo's dresses could be typical Mattel/Pre-Mattel. I'll get pictures of my Addy wearing it soon.
Mine is like yours. I don't remember what year I got it but probably between 1993-1995. It's not like Felicity's travel gown. It's held up to storage and occasional wear for all these years.