Lenox Belleek stein, Arts and Crafts design

I purchased this Lenox Belleek stein at a shop in El Paso, Texas recently, intrigued by the Arts and Crafts design. Based on the pattern, I'm guessing that it was manufactured sometime between about 1906 and 1916, but I haven't been able to find the pattern anywhere online or in the few references that I have. This piece does not appear to be signed by the artist. Can anyone provide additional information? Thanks.