MLB Subway Sign with Field Dirt Atlanta Braves. This vintage-style Subway Sign is a must-have for any Atlanta Braves fan! Rather than showing the stops along a subway line, this unique sign details stops along the Braves' history. Comes in a handsome frame, and measures 1" thick. Features dirt from Turner Field, authenticated by the MLB! Guaranteed authentic by Steiner Sports. Materials: Mica, Plexi, Glass, Dirt.