Spectacular 1960's Dress

What an incredible pattern! It is a straight shift style, with matching belt/headband This has been overwhelmingly loved. It is made out of early, fragile polyester. The back zipper is in good shape as is the right seam. The front has ripped from the neck partway down and the left seam has also ripped. The hem has come unstitched. Both pits also have some damage. Pit to pit 48 cm (19") Shoulder to hem 99 cm (39") There are no tags at all, so my Grandmother might have made it, but she bought lots of clothes from a local Seamstress in Toronto at the time. 100% Polyester