I bought this Olmo Sintex off of CraigsList from a guy in Orange County about ten years ago and sold it five years later for roughly the same price - $350. That was a steal, and I truly wish I would have kept it. It was a 60 cm frame made of Columbus SPX tubing - slightly thicker-walled for longer tubes, but otherwise the same quality as SLX. I don't remember the original brake brand, but I added a set of NOS black Modolo Equipe brakes that looked nice and worked very well.
The rest of the components were Shimano Dura Ace, if I remember correctly, but the wheels were aero Rigida rims that were heavier than bricks, but looked cool. :)
Ever ridden an Olmo? Chime in with your story, and send photos to vintageracingbicycles [at] gmail.com.
* Year is approximate...but close.
*** *** UPDATE *** ***
I just bought the bike back from the old friend who bought it from me eight years ago or so! Only a little worse for wear, considering how many miles he put on it - 40 per day commuting for a year or so. Am looking forward to cleaning it up and shining up the components. :) I feel like PeeWee Herman getting his bike back. :)