The Kodak Vigilant Six-20 and the slightly more upscale Monitor were the company's last stab at marketing a medium-format folding camera.  By 1948 when the line came to an end, people were ready to move on to new paradigms in photography.  The Anastigmat Special lens and the Supermatic shutter were as about good as anything available at the time, but the ergonomics of the Vigilant left a lot to be desired.  Estimating focus with a 101mm lens is not for the faint of heart, and neither the flip-up finder on the top deck nor the tiny reflex viewer over the lens offered much help in accurately framing the composition.