After a long wait I finally found a genuine factory C15 trials.
This is a 1963 C15 Star Trials, with the original frame and engine number.
Starts very easily (low compression), rides really well, just a little slow with the trials gearing.!
Its had a few mods from new, but has competed in many major events, like the Scottish six day.
I won't be restoring the bike, just leave as it is with all the character.
I do have the original forks, but these Ceriani were added when competing, apparently they perform better.?