David , thanks for the clarification - now you have explained it what I have r ead in mybooks and on the net now makes sense and equate to 1965 too!
And Ross - Thanks - I hope you get lucky one day too.
Thanks to all for your interest and comments.
I do have to say that this is the most valuable piece I have ever owned - and it scares me! I think I will have to insure it for peace of mind......