That's great, thank you. Earliest catalog I've been able to find so far is '89. Too recent. My numbers for TT length and wheelbase match the '81 catalog well with the exception of chainstay length. Will have to re-measure. And I'll get around to measuring angles at some point. Time to buy a digital angle-finder and graduate from the folding protractor.

Odd that the retrobike link above with an early example very similar to mine mentions having a serial number. One has not surfaced yet on mine. From what I've found so far, early Kleins have the serial number on the underside of the rear dropout, and they show through the fairly thick 'Durethane' finish (finish/paint referenced from '89 catalog). I'll update if I find anything on the steerer tube when I pull the fork.

This bike is very well made (best I can tell through the paint at least). Exceedingly smooth welds. The transitions from the chainstay bridge/web to the surrounding material flows very well, same with the transitions from the dropouts to the stays. Fork rake is pretty to my eye as well.

For this bike having fairly tight crit geometry (curious to compare to my CAAD), I'm surprised that it might fit a 27mm tire. 25 won't be a problem. I suppose that's a product of likely being built somewhere between '75-'79. Tires will be ordered in a few weeks for aging while I get around to a thorough cleaning. I grabbed the same '70s record stem in 120mm, as this one (130/140?) will likely have me stretched out a bit much. I'll throw the black hardware from the original stem onto the replacement - to my knowledge, 3ttt record stems from this era came with chromed steel hardware, so the black bits were possibly added by the original owner - the previous owner didn't touch a thing other than fit. The expander bolt for the stem uses a 7mm Allen wrench - I've only seen these with 6mm.

I'd love a copy of any info on the Team Super (or general info) from your '81 catalog, would you mind? I'll find a way to repay the favor.

The '89 catalog shows a color very similar to mine - Very Fast Red. Can't wait to do my damnedest to make that true.

I would love to find one of these posters:
The Retrogrouch: Priorities: A Cool Old Poster


Thanks again for the help and interest.