Vintage 60/70’s BELFRY GERALD PIERCE orange White Mod Zipper S/s Dress Medium?

Stunning piece of 1960’s/1970’s fashion by BELFRY BY GERALD PIERCE. Orange and white geometric pattern with a white zipper down the front. Thick material, feels like a polyester/cotton blend. No material tag. No size tag. Some ink marks on collar but overall in EUC excellent vintage used condition. Underarm to underarm measures 20.5” laid flat. Waist measures 20” laid flat. Hips measures 24.5” laid flat.