Whenever you see a lantern with no globe plate wires, you need to look at the back side for where the wagon reflector plate was attached. This usually consists of a soldered seam on the fount and a hole for the top reflector mount in each tube. It appears to have a Vesta globe. It is surprizing to see the outside flag lift plate on a lantern with a 13/16" fill. If you find the reflector mounts then this is probably an early version of the Dietz Roadster, which would make it 1915-1916.