Beautiful antique lamps

Hi and Happy New Year all. I found these beautiful antique lamps at an estate sale and am trying to get any information on them. I think they are circa early 1940's. The shades have some damage on the inside, rips. they are stamped on the bottom GIM644 M.C.C.O. I love these and they look great in my home, I do plan on keeping them but would love some history on them, like if the time period I found is correct and if I could find their value that would be great. I paid $50.00 each for them and think I got a good deal but I'm really not sure.Any help you can give me would be so greatly appreciated. I am also posting a glass clown I found at the same place. Thank you so much in advance. saw244@aol.com