The crank set is a single ring affair, a Sugino No. 3. The pedals are really cool: pull the what looks like the dust cap and it folds flat:
The rear mech is a SunTour AR, defended by a chromed bracket, which seems like a good idea if you're going to be schlepping this bike around on buses and trains. More interestingly, the shifter cable is plastic-covered. I only discovered this when I replaced it with a new cable. In hindsight I shouldn't have replaced it, as it still moved pretty smoothly:
