Hello Moshin. I can't believe no one replied to this. I think the best candidate for your beautiful TSX frame is a '92. The '92 catalog shows the TSX frame to in the same state as yours with minimal decals. An english BB shell would certainly put it in the '90s. The catalog simply list it as TSX and it was offered with Campagnolo Athena 8spd with Ergo shifters.
Hope this helps.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk