Originally Posted by
trailmix
Wheelbase is way too short for it to be an ST. Also the lack of rack and fender mounts rule out a touring model as well. Paint looks similar to my wife's 86 SR500, I think it was called "rose". It could possibly be a prototype for their first racing model which first appeared in 84 or it could have been built at one of the after hours welding workshops at the factory.
Thanks for the info. Geometry actually seems fairly close to my Colnago by eye. ST and TT CTC lengths are almost identical at least. ST and HT angle seem close. I think the toe clips are mediums and there is a tiny bit of tow overlap with them (doesn't bother me), so yes, tight racing geometry from what I can tell w/o yet measuring. Color does look close.