[Johnson] Where is the Johnson Historian?

[Craig C. Heaton]

I'm sure someone in the group can satisfy my curiosity about the Viking
500's and that person would be viewed as the Historian. How many different
versions of the 500 were produced, when, how many, and what were the
production periods?

Most important question is the number of versions. This would answer the
differences between the schematic and what is in the chassis.

Thanks for the info,

                   Craig