I too am doing research and at the moment the word is that the Miller bike was the only one produced as a prototype in late 64 but volume production didn't start till after January 65;
From a source in the UK;
"Miller rode the M10 for the first time in a UK trial the day after the British Experts in November 1964. The bike was his own development bike and wasn't available to the retail market until after January 1965, but I don't know where you could get what would be considered as conclusive proof of that.
However, the whole point of the cut-off date of 31st December 1964 for Pre65 trials was to exclude the Sherpa. When Pre65 started here in the UK, over 3 decades ago now, there were no 'modernised' bikes, so the Sherpa would have been just as far ahead of the British bikes in Classic trials as it was back in its own era. That date was chosen as a Sherpa wasn't available to buy before then so it didn't qualify and the idea was to have a British bike only series."
Your bike is obviously an early model but cannot be Pre 65 in what I have dug up so far.
Before people take me the wrong way I think its great that you have gone to the trouble of presenting your bike in superb condition and it needs to be ridden not hidden.
I also agree that our rules need to be more clearly defined so that we don't have these disagreements and we can get on with riding trials bikes.
Would love to see you up here in August,,,,,,,,,, riding Twinshock of course
Cheers
Twinshock





