i've seen the sekai 4000 live an in-person, and i actually have a sekai catalogue that i'm in the process of scanning to input to the bike catalog archive. do you have such a catalog /? i have the 1977 one, but am missing the picture of my own bike, the 2500 - i must have stupidly cut it out or something ...
and the 2500 was stolen in 1985. rats.
- Don