From the Music & Memory collection.
Inspired by the Dunedin Town hall Dances which were held from the 1930s -1960s. When girls would have dresses and stiff petticotes for maximum twirl. A comment made by my Mum about dresses of the time. "Only Fast Girls had dresses with zippers down the back. Good girls had zippers in the side!". 
Beautiful black velour felt. Fit up to 23"