130mm spacing indicates 8 or more cogs. The first 8 speed system was 1989 Dura-Ace. Not very manufacturers adopted 130mm spacing that year. In fact, Shimano designed the rear hub's locknuts with a conical outer face to facilitate insertion in a 126mm rear triangle. Campagnolo went 8 speed in 1991 and SunTour followed in 1992, which was also the year that Shimano trickled down 8 speed to 600 Ultegra. By that point, 130mm spacing was the standard on high end frames and bicycles. This would indicate it's no older that 1991/1992, but I also have a 1992 retail catalog and it shows three Vitus frameset, the Kevlar 9, the 992 and the 979. This would imply that your frame is no older than 1993.