Vintage 70s Dagger Collar Rainbow And Gold Metallic Stripe Blouse Medium

Amazing vintage 70s blouse with classic dagger collar and rainbow stripes. Gold metallic threads woven into the fabric. No fabric tags but I would assume polyester, no stretch. Good vintage condition, but there is some wear in the fabric. It's hard to see in the photos but there is some fading of the saturation of the colours in some places, and one of the buttons has had some of the brass colour come off. Both shown in last pics. No other marks or flaws. Would best fit a modern medium, please see measurements. Approximate measurements laid flat PTP 21" Length 26.5"