Cubist vase in black opaline 1669 by Anatole RIECKE art deco

Black opaline cubic vase by the artist anatole riecke, decorated on one side with an abstract pattern. The decoration is made with natural pigments. Signed and numbered. Dimensions: see photos. Wear marks on the underside, see photos. I am selling 2 other vases from the same series by the same artist, see last photo.