Oil painting on canvas old still life

Large old painting, oil on canvas representing a still life. Very pretty shades of bright gray/blue colors. Canvas framed by a light wooden frame. The painting is not signed or dated on the front but bears the words “degrave - lille” on the back; undoubtedly a school work. Good general condition, note: some marks of time (a small loss at the bottom left, small black dots in the middle, canvas slightly relaxed in places). The whole thing is visible in the photos. Dimensions: l66, h51, frame thickness 2.5cm.