I.Magnin 60s vintage gown size M(estimated) in EUC

I.Magnin 60s vintage gown size M(estimated) in EUC own a piece of American fashion history! I. Magnin was a legendary San Francisco department store that was founded in 1876 by Mary Ann Magnin and her husband Isaac. this dress is will bring sunshine to any room - bright yellow with velvet pattern fully lined union made no content and size tags, please confirm measurements pit to pit 19" waist 30" shoulder to hem 59"