Python, that means it was a very decent bike for its era! That is one of the things you look for in a vintage (70s/80s) road bike, high-tensile carbon steel. I don't know what the heck it means, but it translates to bikes that are bit lighter and nicer to ride.

Or so I'm told. I'm starting to think that the fit and the saddle and the tires and things like carbon seatposts and forks matter as much as the frame materials. Based on what I've ridden in the past I thought I preferred steel, but I rode a not-fancy aluminum frame with a carbon seat post and fork over some really rough road last weekend, and it was far more comfortable than my steel road bike (which does have a carbon fork). I think in that case it was because the reach was short enough that I was able to keep more flex in my arms and take some of the shocks in my elbows, but I really wasn't feeling the road bumps too badly in my butt, either.

Whatever happens with my next bike, it is going to have a carbon seat post.