1930s big original oil painting portrait

Ancient antique oil painting, huge, with a portrait of a middle-aged woman. The artist made his first attempt on the back, sketched, started with color, and then started again on the other side. Canvases were expensive back then and many artists were poor, so they used what they had. The picture once had a magnificent golden frame, which probably no longer exists. Height about 120-130, width about 80-90cm. A fantastic vintage image. Selling with a heavy heart. Condition very good, above two white paint spots.