There was no model 310 in 1990. The last year that this model existed was 1986. There was quite a bit of variation on this model, depending on exact year, but in general it was a lower mid-range model. The frame was always CrMo but early years were plain gauge, later being upgraded to double and finally, triple butted. Forks on early versions were hi-tensile with later versions being Mangalight. Geomtetry was club racer/triathlon. Prior to 1984, components were SunTour/Sugino/Dia-Compe mixes. In 1983 and later, , the mix was typically Shimano 105 derailleurs with SR cranks and various brakesets. The only year to feature 700C wheels was the last one. You really need to ask the seller some specific questions. Do you have pics? I can probably identify it from one.