Small old-fashioned acrylic or oil painting on vintage linen, unsigned

Lovely little painting, interior scene depicting 2 chairs around a table. Vintage 50s-60s, acrylic or oil on linen stretched on cardboard. Unsigned. Old-fashioned, melancholic style. Some unpainted areas, pencil sketch a little visible. In shades of gray, white, black, burgundy, sky blue (be careful the blue is more yellow than in the photos) and beige linen. 37.5cm high, 24.5cm wide, 5mm thick. No frame and no attachment. Very good condition, nothing notable, natural patina of time. Approximately 120gr.