I ended up with 4 or 5 lamp kits over the years at yard sales. I also still have single, two way, and three way lamp sockets and base sockets, just used my last ceramic extra in the garage last year. When the national big box home improvements drove the locals under I bought a "lifetime" worth of a lot of things for dirt cheap. At 1¢ or 2¢ I didn't buy lawn bags for a decade either, lol.
I just used one lamp socket in faux fireplace logs the other day with a 15w vs a 7w candlebra (toying with tv backlighting levels...kinda funny, I don't really watch it) . This one has an extra long 3"(?) lamp control shaft topped with a dark "wood-brown", octoganal at least, vintage twist knob. I'm tempted to try to run the fast angle sized shaft out of a hole in a log's branch stub, if I can get the knob off & use a small hole I think it may hide in plain site.
Your lamp reminds me of designers wishing petina would set in sooner, on copper gutters espially. And the homebuyers that would inquire about "getting those fixed" usually about 2 years later (it's just getting started?) "Green&black" = "pure gold" to these home designers 
