Calvin Klein gold/gray ombre dip dye silk dress

Gorgeous, shiny silk dress has twist knot straps and a lightly lined/ padded bust. Low cut in front and back. Deep gray at bottom hem fades into creamy gold for top of dress. The skirt is lined. Worn one time for a special occasion. There is a very faint discoloration under the arms, possibly something a dry cleaner could remove. I've tried to show the spots in the last 2 photos.