Opinions on this lamp appreciated

I bought my house in 1982 from an estate. The attic had a number of older items in it, including lamps. This is the first of a group that I'm posting hoping to get some of your expert opinions. I know nothing about lamps and/or what is collectible. The lamp shade on this one is glass and one of the green glass panels is cracked (the panel at 12 o'clock in the top view photo). The base is solid metal, hopefully the bottom view shows this.