I took the actual output of the TK-1C and fed it into a video capture board on my computer to get this image.
Notice the slight distortion of the pattern. The TK-1C had no off/on switch, and normally was left on 24 hours a day for years. The Monoscope Tube in this TK-1C is weak, and I had to run the beam high to get a decent output. That caused slight distortion of the image.

Click here to see a better Indian Head image.