Oscar de la Renta Vintage Black Dress

Classic Oscar de la Renta black dress/shift that can transition from office to evening. This vintage dress is from the late 1960s or early 1970s. Fully lined and in good to excellent condition. There is no fabric label but I am guessing it is polyester but has a linen look and weave. Size is listed as a 14 but this is vintage so please check out the measurements. Dry clean only. Pit to pit 20” Length 40”