Vintage 1960s 1970s Neon Barkcloth? Halter Maxi Dress Summer Floral 10 M

Beautiful true vintage dress from around 60s-70s. No brand label. Pink orange, bold floral pattern. Full length, halter tie back style. MODEL IS A.I. generated using a photo of my dress. Otherwise, all my photos. I believe this fabric is called barkcloth, marked ACRYLIC. It also includes natural cotton lining at bust (see photos, it has some yellowing from age on it). Shown on a Medium (8) dress form. Measurements of this garment laying flat and unstretched: Underarm to underarm: 16 Waist across: 15.25 EMPIRE waist Sleeve from shoulder: na Length (ARMPIT to hem): 47 (MAXI)