Train Lamp

I found this little cutie in the bottom of a box of stuff I bought at auction. Its only about a foot tall overall. The bottom is Very heavy, originall I thought it was metal , but its more of a Super heavy Porcelain. Hand painted. The shade is like a Melmac material, and on the inside it is hand painted so when the lamp turns on, it illuminates color through it. I cant find any marking on it anywhere. I dont know if its old, important, or from the dollar store. Anyone know? Either way, its kinda cute.