Vintage navy Koret scooter skirt hidden shorts

Excellent vintage condition bright navy scooter skirt by Koret of California in size 14 (modern size 8) from 1950s or 60s. Hidden shorts. Zipper behind button placket. Shorts front is same waffled fabric as skirt; shorts back are poly. Laid flat, skirt measures 15 inches at the waist, 20 inches from waist to bottom hem, and 20.5 inches at the "hip" level. The thigh opening of the shorts measures 11.5 inches across. Machine wash and tumble dry at low setting, but I handwashed and hung dry.