1972 Lanvin by Jules-Francois Crahay Printed Silk Jersey & Waffle Weave Low Back DressThe fabric on the dress dates it to the 1972 collection. He did use some fabrics similar in 1971 as well so it is in that range. It was made under the creative direction of Jules Francois Crahay. Crahay headed the Lanvin ateliers from 1964 1984 and he has been noted as one of fashions 'great colorists with his colorful patterns making his 1970s Lanvin designs hugely desirable and influential.' His time at the Lanvin label is one of my personal