Another vintage family piece

Another vintage family piece, this time from the inheritance of my boyfriend's grandmother who passed recently. The ceramic set consists of a wash basin with a pitcher, a soap dish and a comb holder. The stamp on the pieces says "Societé Ceramique Maestricht, Made in Holland" with a picture of a lion. We don't know how old the pieces are, but this particular stamp was in use between 1863 and 1955.