Jane Derby was a designer of high end ready-to-wear. Oscar de la Renta took over design duties at the company in 1965 right before Derby's death. This dress from the spring of 1964 is likely one of her last designs. The simple sheath dress with matching overblouse are fashioned of lilac cotton blend cloqué. Sold for $125 in 1964 (about $913 in today's dollar.) The fantastical hat is by Emme.