Vintage orange floral Mad Men dress size 10

union made in Canada vintage 60s dress with 3/4 length sleeves, sewn in sash detail at the waist (with accompanying brooch). Centre back metal zipper. Lined skirt. No fabric details but fabric has a slippery texture and likely a poly or poly blend. Some discolouration inside at armpits, but no external issues of note. Laid flat measurements Pit to pit 22 inches Waist 17 inches Hips 22 inches