Gertrud made the vases and bowls, while Otto created the glazes and worked the kiln. Gertrud is known for her simple, elegant designs. Otto perfected over 2,000 glazes, which gave each piece a unique color and texture. Some were smooth, while others were pocked and cratered.
After Gertrud’s death, Otto continued to work with clay into the 1990s. He died at age 99. The Natzler’s pottery is highly collectible and quite valuable.