VINTAGE 60s Mod Navy Short Sleeve Mock Neck Shift Sheath Knit Dress

True vintage 60s mod navy shift dress with short sleeves, mock neck collar, back zip. Got from a vintage boutique and never had a chance to wear it. No labels but feels like a thick knit. Gently pre owned; has a few small snags and pulls but nothing major. See photos. Color is difficult to photograph but it’s a dark navy blue. Estimated to fit a women’s 4 or small. Measurements: Bust 35” Waist 33” Hips 35.5” Length 37”