Other Unknown Unique unclassified dresses

I purchased this dress at a bridal store close-out sale, where it was being used as a floor model/ photo shoot and runway dress. The original price on the dress was 1,500, I believe for the beautiful silky material the the bottom of the dress is made from. The dress had a hole in the train, but I shortened the entire dress so that it just grazes the floor int he back (I am 5 foot 7). I wore this dress for my outdoor wedding this past 4th of July weekend, and it was perfect. It is light and airy, and moves beautifully in the wind and walking and dancing. The top is a beautiful, intricate, white lace pattern, and the bottom is off-white. The dress had no tags when I purchased it. I do not know the label size, but I think it fits like a true size 4. The top fit me (I wear a B cup) but I think it will fit a C cup well too.