Vintage 100% cotton white maxi dress medium drop waist button from embroidered

Excellent condition no flaws The brand and size tag have been removed from this dress and despite all my efforts, I cannot figure out what brand it is. Judging by the construction, the fabric and the extra buttons sewn into the inside seam, it seems very high quality. Corset/princess seams in front lead to a V front drop waist. Back with smocking at lower back and open criss cross straps to upper back. Smocking has lost most of its elasticity. Beautiful white floral embroidery to upper part of dress all in good condition. Button loops well constructed and all completely intact. Functional pockets at waist. See measurements as medium is my best estimate. I’m a size 10 in dresses/shirts and this fits but is just a little too tight in the rib cage. Flares from the waist so fits most shapes below the waist. Materials tag has been removed but this feels like and washes up like 100% cotton. It’s fairly crisp and needs ironing after air drying like cotton does. No stretch to material. **if you recognize this dress please let me know what brand it is!