Vintage Women's‎ Button Down Shirt Buffalo Plaid Lightweight Maroon Brown Blouse

Beautiful lightweight plaid shirt Unfortunately the tags have faded so labeled brand, size, content isn't known. My estimate is a women's medium but please see the measurements. The Texture RN number is also mostly worn away but it seems to be 33527, making the brand probably Jack Winter. I don't know the era but some other similar Jack Winter shirts are from the 70s, could be 80s or 90s? One of the front pockets have a slightly rough patch and a sleeve and size back area have some flecks of possibly paint