Artist: Betty J. Rolenz, 1991. Likely a souvenir from a past convention. The artist did an excellent job with this Adrian gown. "Letty Lynton" was the name of a 1932 Joan Crawford film. You'll find this paper doll on the convention freebie table.
Here's a photo of the Letty Lynton gown as Crawford wore it:
The Wikipedia entry for Letty Lynton reveals this gown was a smash hit, and 500,000 copies were sold. The movie is rarely seen except in bootleg copies, because of a plagiarism lawsuit. I see online discussions from two years ago about its imminent release on DVD, and will check Netflix. The movie is from the pre-Code Hollywood era, before the censors shaped Hollywood and forced every sinner on celluloid to get his or her due before the final credits rolled.