Oval Tube lugless "Colnago"

[Dombo]

hi, does anyone know if Colnago ever made lugless frames with oval steeltubes? I picked up a bike recently off ebay - only paid around £100 - and wondered as to its providence. It has campag rear drop outs and all usual cable and front mech brazings but the only stickers were put on after painting along with the previous owners name and not sealed with vanish. weighs about 22lbs. I'll try and post some pics. thanks for any advice.