Marion Donaldson Scottish designer vintage 70s maxi

Early 70s dress is 56” long, sleeves are 23.5” with elastic at wrist. Bust 36” high waist (where your bra band would be) to 30” & hips 38” max. No fiber content but feels like a predominately cotton blend, lining is acetate. Dark brown velvet ribbon trim, zips up back. Square neck is a little low so C cup & up will show some cleavage. MarionDonaldson was a Glasgow based designer. The gold label dates it to the 70s. These are rare to find in the US.