One difference between my camera and the one pictured for sale here is that my camera has a Bail Back handle.
Ron Wisner did not produce that many camera's for Zone VI.
There is an article on the View Camera magazine website in regard to Zone VI where Richard shares the history of the company.
Richard Ritter is the real genius behind the design of the camera's that were produced in Vermont. I was recently in Vermont in August of this year. During that time I took a trip to Newfane (excuse my spelling its wrong) and talked to the locals and found a few that actually new Fred Picker. One of them took me just outside of town and showed me the building where the camera's were assembled. Bruce Barlow and Richard Ritter both worked for Zone VI studios and are members of this website. They also put on workshops during the year and Richard restores and designs camera's.
After doing some research I wrote a guide on Zone VI camera's with a time-line that you can find on ebay.