Van Briggle Art Pottery Mulberry Three Frog Flower Frog. Arts and Crafts/Mission Movement. The clever design has three frogs with thirteen holes to create a flower frog. The rich mulberry-colored matte glaze is enhanced by a dark blue wash. This lovely original piece of American art was made in Colorado Springs, Colorado. The piece is not signed but it is an unmistakable creation of Van Briggle Pottery and Tile (1901-2014), with their signature high quality clays, color palette, and wonderful glazes. It dates from the period 1900-1919. Here is a fine antique collectible that’s both beautiful and useful.