Model 68 Lawson gas fireplace insert. Early 1900's. Made in Homestead, PA. Also US Patent 943,617 of 12/14/1909
View attachment 1676263
https://screenshots.firefox.com/x2f0i1iCbBkxl6ih/books.google.com
Also a Native American symbol.That symbol used to be a boyscout symbol before the nazi started using it