Those bricks may have been made by the Dixie Fire Brick Co. in Alabama. According to Gurcke (p. 215) they produced a brand called Champion between 1935 and 1942.
Gurcke, Karl
1987 Bricks and Brickmaking: A Handbook for Historical Archaeology. The University of Idaho Press, Moscow, Idaho.
Erica Gibson
Lab Director
Sonoma State Univ.