Vintage Frankoma Trivet Seals of Five Civilized Tribes of Indians in Oklahoma. This glazed vintage Frankoma pottery trivet shows the seals of 5 civilized tribes of Oklahoma Indians including the seals of the Choctaw nation, Seminole nation, Chickasaw nation, Muskogee nation and the Cherokee nation. The Frankoma trivet is 6.5” and made of Sapulpa clay. Interesting history and design on this red pottery piece with a cream glaze with small legs to lift. Measures: 6.5” x 1/2” Weight: 1.2 lbs.