From the #10 Three Toed Line, a small but important line which appeared circa 1951, and remained in production after 1970. An important line for 2 reasons, all pieces except the FlowerLites were available with the Prelude Etch, and all pieces were sold in quantity to both Silver City and Rockwell Silver companies for decoration. The lemon plate and bon-bon of this line were formed with the same mold. (Info from Viking Glass 1944-1970 by Dean Six)
This piece has the Prelude etch.