It appears that the image you’ve provided does not contain the artwork “Rose Gown” by Erte, who was known for contributing to the Art Deco movement through his design work. Without the actual artwork depicted in the image, I’m unable to provide a description or analysis of “Rose Gown.” The image you’ve shared is only an empty frame with a light blue background, which doesn’t give any information about Erte’s “Rose Gown.”
If you have an image of the actual artwork or if you are able to provide more context, I would be able to offer a description and discuss the signature elements of Erte’s style and the Art Deco movement represented in the design. Erte’s creations were often characterized by elegant lines, stylized forms, and a sense of luxurious opulence that echoes the aesthetics of the early 20th century Art Deco period.