7H Myan-Aztecs, white sand glaze. S7/P7, Ada clay. Double diamond "S" hole set. This is an unusual and rare pair of shakers. Frankoma added white sand to the Myan-Aztec glazes in 1952. They changed to the double diamond "S" late in 1952 or early in 1953. Frankoma also switched from Ada to Sapulpa clay in 1953. This shaker pair probably dates from late 1952 with 1) the new MA glaze white sand, 2) the new double diamond hole pattern, and 3) the very last of the Ada clay!