Vintage wool sweater by Lulle O’terstad in Norway

Gorgeous vintage sweater. Was my mom’s so I’m guessing it’s from the mid 60’s. All metal buttons intact, no snags or holes. AMAZING condition. My mom was about 5’1 and extremely petite, so I’m guessing a small or x small. Measurements are pit to pit 16”, shoulder to hem 23”, collar to wrist 25”