Vtg 50s 60s Flat Knit Brown & Gold Open Front Cardigan Sweater Jacket Sz

FAB vintage late 50's / early 60's flat knit cardigan sweater jacket with an open front.   Brown with gold knit accents.   Fun button detailing with NO missing buttons.    Has a union label on the inside seam.   Unsure of the fabric content....   Great with jeans, or dress it up a bit!   A really versatile piece!  No tags, so please be sure to check the measurements carefully.  All measurements are taken with the sweater laying flat, so may need to be doubled.
Shoulder to shoulder - 18"
Underarm to underarm - 22"
Shoulder to bottom hem - 21"