Mine is M2E19918. Guess that's May of '82. I don't know much about bikes, but I know this about it so far: it's a Cr-Mo 500, with a triple crankset and Shimano Deore components that appear to be original to the bike. Front and rear rack braze-ons, but no water bottle braze-ons. No "made in Japan" stickers, but I can't imagine what else it would be. Stem is not original, but another forum member is sending me his stock stem to try. Got me some angry samurai stickers. The wheels are 27". I assume the crankset is 18 speeds, but I don't know much about these things (learning though!). The brakes are also Shimano. Seems to be a touring bike, at least to some degree, but I don't know what slack geometry looks like, so I'm not sure. The current tires don't hold air, but when I did some short test rides, it seemed very smooth. I'll post pics (I have them in other threads. God knows, everyone has seen this thing by now) when it's all beautiful and shiny.