Antique French Impressionist oil painting study of a garden possibly a design for a postcard or advertising piece

Antique French Impressionist oil painting study of a garden possibly a design for a postcard or advertising piece. French School, circa 1900. Impressionist in style. Art Nouveau period. Unsigned, artist unknown. Oil on board. Black frame is more modern. Size of frame: 15.5 x 12.5 inches; Size of painting: 14.25 x 10.75 inches; Size of front painting aperture: 14 x 10.5 inches. Weight: 663g (allow 3 kg volumetric weight once packed). Condition commensurate with age - various superficial marks & scratches and some craquelure but all part of its charm and character. Priced accordingly.