I have looked all over trying to find anything by YSL that looks like this and have been unsuccessful. This was a dress I wore as a child and my mom recently sent it to me. I'm sure she's just kept it in a box somewhere so it may be slightly discolored but I do remember it was an ivory color. Has anyone seen anything like this?
Are there any other labels? Should be a care, fabric, label - maybe down a side seam or underside of this one. Labels help a lot during these eras. From style, is similar to girl's wear of the mid to late '70s and there's a similar label in the LR marked as '60s so more label information should help if it's available.