Update on my Junior Wagon lamp.
I finaly got to fire it up and noticed that it was pulsing (blocked air tubes). In taking off the burner to blow out the tubes, I noticed that it was painted, thus not the origional paint and so I stripped it down to bare metal. The lantern had some solder repairs to the tank, and no patent dates were found to have been stamped on the lantern. BobbyB's date range of 1920-1932 I believe is the closest that I can get.

Thanks to everyone.

Steve_G