Based on the hash marks on the fork, I'm pretty sure this is a 1987 model. If so, it's an oversize CrMo main triangle (presumibly plain gauge, as there's no mention of butting) with hi-tensile stays and forks, SunTour Alpha 3000 derailleurs, Dia-Compe cantilevers, Sugino VP triple crankset and Weinmann aluminum rims laced to Joy Yu hubs (QR on front only). 5th in a 7 model ATB line. Original price probably $250-$300US, based on comparable models from the competition. Hopefully this will help to tide you over.