Vintage 70's Green Womens Blouse With Tie Sash by Helene St. Marie Size 10

Green vintage size 10 blouse. 100% polyester. Tag reads Helene St. Marie. Vintage clothing sizing often differs from current sizing so please review measurements provided. Buttons on each cuff and hidden front button closure. Looked over closely and freshly laundered with no obvious blemishes. I am not a vintage clothing expert but based on the paper tag, being made in the USA, and the look I am guessing this is 70's. Tag RN#56624. I have more vintage blouses listed so bundle to save.