Harry Lawenda  

Yes, I believe they are...
Yes, I believe they are pretty rare, but not extremely rare. I've come across them at a few points...
I know guy who has the 'ball in cage' lamp.
Any one on DA have some Lawenda stuff?

The two I've seen
are sturdy, well made and fairly large grand table lamps. My late friend's ball-in-cage is exact like this one; his spring lamp I've never seen another one.
In my opinion, these are extremely beautifully designed lamps. Thick wrought iron and a great chunk of round wood.

Tis a beauty!
Would look great in my place!