colnago TT frame for 1980s olympics -info needed

http://www.wooljersey.com/gallery/v/...pic/?g2_page=6

I recently asked for identification of a frame. i found this on the net. my frame is identical except that it has curved seat stays.
Can anyone provide more information and perjaps give an idea of its value?

Many thanks,
Mike

sorry... I forgot to add, the top tube curves down towards the front.
cheers,
Mike