John, below is what I show in the Used Bike Buyers Guide for Olmo. The Sintex is only shown one time, but that doesn't necessarily mean that it didn't exist other than the listed date. Sounds to me like it must have been used in the early 1980s too based on your description--or, the parts were added to a newer frame. Hope this helps. Lou Deeter, Orlando FL
OLMO: http://www.olmo.it Via Aurelia 22, 17015 Celle Ligure, Italy 011-39-19-990157. Founded in 1941. Bicycle Parts Pacific, 2135 East Main, Grand Junction CO 81501. Founded in 1939 by Giuseppe Olmo in Celle Ligure, Italy. Five pointed star with Italian colors and Olympic rings in decal. Low BB, short wheel base. Campy and Columbus dropouts. Columbus tubing. Engraved seat stay caps.
Models:
Competition C/Special 84 SL
Nuovo Sprint 84 Aelle
Professional 85-86 SL
Firenze 85-86 SL
Ligure 86 Columbus
SL 88 SL
SLX 88-94 SLX
Cinquantenario 89 SLX
Leader MS
Corsica 90 Oria TCO
Sintex, Kronos 92 SLX
San Remo
Gara 94 Columbus Gara