Here's what I know: Tesch 101 was a combination of Columbus SL and SP. He started building on his own in the mid-80s, primarily custom work for pro racers. His production bikes, the 101 and S-22 (fillet-brazed True Temper and actually built by Leo Castellon, who also built his very limited production MTBs) would've come some time after that. Most 101s I've seen have been '87 and '88, but that doesn't mean it was limited to those years (a little late for the parameters of this group but we can call it KOF for purposes of this discussion). From what I understand from his sister he wanted to get back into building before his untimely death (brain tumor I believe). In any case he was a great talent and colorful character. Dave Moulton wrote a nice piece on him in case you hadn't read it:
http://davesbikeblog.blogspot.com/
Scrrreeeeamer bikes in any case. Enjoy!!!
Peter Tengerdy
Sarasota FL USA