CALVIN KLEIN Gown - Is this made-to-order?

Hello All,

I bought this Calvin Klein gown in or about the late 80s/early 90s at Sloane Memorial Thrift Shop in NYC because it reminded me of Barbie's Solo in the Spotlight gown. The only tag is the designer's label. The lady at the Thrift Shop told me it was made-to-order for one of their most frequent donors. I never wore the dress and now plan to sell it, however there are no size or fabric tags and all I know is what the sales lady told me. Is the label one that Calvin Klein used for unique pieces?

Thanks in advance for your help.

Mia