Ron:

For the history and dating, have a look at our Master Reference Table -- linked below. The Veronas were introduced in the late 1970's.

In terms of the values, Automatic Veronas in very good to mint condition will usually go for over $1000 (maybe even over $1200). They are relatively rare, compared with other Cal. 12 models, and have a strong following, based on their size (relatively small for a Cal. 12) and elegant design / clean lines.

I hope that this helps.

Jeff