Well done Jerry for opening up a great debate. Yourself, JC, Firko, Husibul, etc, etc have added some very interesting aspects to the debate and I hope we find out more conclusive evidence in the future about JP's frame but as it stands I think it was more than likely a pre production MK7 frame. I think for a small Euro factory, Bultaco did an amazing job to achieve what they did on the world stage against the then arriving powerhouses of the Japanese and other Euro manufacturers. I would like to list the Australian acheivements of the Bulatco marque on Australian scramble/motocross scene from 1971 to 1975 but I fear there is not enough capacity on this forum
No really I am biased but this little Spanish motorcycle company did very well compared to the tsunamy of manufacturers ready to engulf them in the later 70's.
Great debate Jerry, cheers.
Stan.