Thanks, William, for your replies to both Qs about these trees. FYI, The Glow had an article about 12 yrs ago re. restoring bubble light trees that might help both of us.
A follow-up Q to you (and others who might read this post): What does the bottom of the "cone" that holds the lights and branches look like when you remove it from its base? (Again, I'm still trying to determine whether the corrugated rim of the enameled green cone of the BL tree I described is the true base, or whether some sort of pedestal-like stand is missing.)