Still life bouquet of priming oval frame

Ancient still life in original oval frame representing a bouquet of flowers (primevères) in a transparent ball vase showing the stems. Circa 30s (?) - signed (unidentified painter) Materials: oil on laded cardboard, light tinted wood frame. Dimensions: l39 X l28.5 X ep. About 2 cm. Good condition of the canvas (some lack/wear - see zoomed photos), back "in its juice" (see photo).