I found these Pucci dresses from the sixties, what a resemblance to the silk dress from the spring/summer 2007 collection, not only is the print similar and keeping with the classic swirls, but so is the silhouette. It seems as though Matthew Williamson has been doing his homework. Available at netaporter.com.
Pucci circa 1960
Photos: www.phxart.org; net-a-porter.com