cuckoo

Hi Folks, I bought a Bultaco frame or what i beleive to be a Bultaco frame a few years ago, however im unsure to the exact type of frame it is. the frame came with a set of sammy miller yolks and a 'radial head' Bultaco engine but the frame remains a mistery to me, could anyone help me indetify it ? i have enclosed a picture bellow, im not really that up to date on spanish trials bikes as i tend to ride british i.e Cotton and Greeves machines, thanks cuckoo10. http://i1176.photobucket.com/albums/x339/cuckoo10/recentpictures060.jpg http://i1176.photobucket.com/albums/x339/cuckoo10/recentpictures061.jpg http://i1176.photobucket.com/albums/x339/cuckoo10/recentpictures063.jpg http://i1176.photobucket.com/albums/x339/cuckoo10/recentpictures062.jpg