Vintage buttercream yellow 2 piece nightgown and housecoat

Vintage approx 1960-79 cotton nightgown and housecoat. I do not believe they were originally a set. Lace on gown features lemons. Lace on coat is floral embroidery on chiffon like material. Floral accent on coat has signs of wear and fraying. Gown is in good shape Short sleeves. 3 button front pleated back and bust line. Brand is Katz. No size label. From appearance small to medium. Coat is button front Peterson collar trimmed in lace label is worn. Unable to determine maker and size. A few stains present on bottom of coat. Please review pics carefully