Gunne Sax Dress, never worn

My mom bought this circa 1980 in the Gunne Sax Factory Outlet store in San Francisco’s Garment District. Back then, factory outlets were bare bones sales floors where clothing manufacturers sold samples, overruns, and imperfect pieces. Tags were cut out by the store. Mom never ended up wearing it, but it has been laundered. I believe this is a size 11, but I show measurements so please look. Fabric is sheer Poly/cotton voile. I inspected it closely and found one small small smudge on a shoulder and some threads that need to be clipped here and there. Note: The slip under the dress is not included- I used it for the photos only. Please feel free to ask questions or make offers😊