Rare Mrazek Deco Pattern

I recently found this rare pattern of Mrazek pottery on a trip to Minnesota. The pattern is "X", each pattern given a letter designation. not only is the pattern deco, but the shape as well. The glass shade is not original to the lamp as the original shades were parchment. I usually don't find much on my trips, but was lucky this time. Maybe next time I will find an original shade in a deco pattern.