Please consider the following lamp which has been in my family for over 50 years. The base is marked with a large (about 3/4″ tall) number 412 and CL&G Co or OL&G Co. The shades are hand painted. The lamp was electrified in the 1940s or 50s.
Your lamp is circa 1880s -90s.
It’s a fairly popular model affectionately known as a Gone With the Wind lamp. This is because these lamps were in the Mansion movie set of that famous movie.
Don’t feel too bad if yours is not 100% original though, the nice part is that you still have both matching globes.
I find many of these without the top globe, in which case, one would be lucky to get $50.00 for one like that.