Wow thank you for the response. By the way, for reference purposes, what is the difference between the 6306-7000 against 6306-7001. I am aware that the 7000 came out first in 1976 and probably had a production span of only 1 year (and probably the reason why its considered rare).
The main characteristic of the 7000 is the large cut out at the crown. May I ask beside the cut out, are there any other characteristic that may differentiate it from the 7001? I assume that they have the same movement, dial and hands. Any other information will surely add to the knowledge base.
Thank you