Quoted from CrazyLevi:Why is anybody giving credit to Harry Williams for Rancho?
This masterpiece was designed by Chris Otis, the visionary genius behind Argosy and Lucky 7.
IPDB credits both Otis and Harry Williams: http://www.ipdb.org/machine.cgi?id=1918
"'Rancho' was the last game that Harry Williams designed for this manufacturer, the company that he founded in 1945."