Its not so much that you are 'clogging up' this forum, more that not so many topics are getting questions at the moment.
Forums thrive on chit-chat, so chit-chat away....
By your question, do you mean see lists of years of Norton production ?
There are several websites that list Nortons numbers.
e.g.
http://www.bmh.com.au/norton/index.php?id=modelnum
Your bike would seem to be a late 1964.
In the US, that may have been titled in 1965, if it took a while to sell out of the showroom.
Note that such lists don't entirely all agree, precise Norton numbers in some years are a little unclear.
This has something to do with the Norton manufacturing year ran August to August,
but the numbers sometimes start with 1st Jan count.
Its also possible that low production levels were being hidden ?