For me, it's this 1973 Nishiki Olympic. I originally bought it for $20 as a parts donor for a Clunker 100 Challenge, and then I stripped it down to bare metal and a few years later painted it and built it as an entry in a subsequent Clunker 100 Challenge. I've since added some fenders and decals. It would be a great bike for puttering around town, but I don't generally putter around town, so I'm not sure why I still have it.
