Adolph schuman i believe is a later label (70s?) and the dry clean only label would say later to me too, even into the 70s and 80s.....but would need to double check with the label resource to be definitive on that, or check Maija's site on Lilli Ann.
This is from the Lilli Ann site:
""In the 1970s, Lilli Ann production became focused primarily on career clothing. Designer Jeanne Taylor developed the "Career Lilli Ann" line, experimenting with new textiles such as Ultrasuede.
The company's productions became very diffuse at this time. Along with the career line, petite, knits, special collections for department stores, an "Adolph Schuman for Lilli Ann" line, and more were marketed in an ever-larger array. ""
So I would say 70s at the earliest on this one...