Antique American Encaustic Tiling Co AETCO Alhambra set of five 6" x 6" geometric floor tiles.  Made from vitrified clay called kayospar. This is a real encaustic tile with no glaze and made with different colored clays. Circa 1919 to 1933.  In very good condition, nice and clean. They have some small chips along the edges but look unused with no signs of mortar.