Looks like it says:
10W & 100W
AUTO SELECT ?FOR?
RECTO TRACKING
So it's 10W, 50W, and 100W with Recto Tracking and the Bold Spongy Variac Switch. The patent number is there for the Variac. 5,091,700
Hard to see, but at least photoshop has a purpose. Maybe all of the print is easier to read on the original picture without the program.
What about it, Octavarius?