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photogravity that new stem is awesome - is the binder bolt aftermarket? Looks way too polished to be a few decades old. what'd you do with the old one?
As for the other comments, thanks for chiming in, I found some of the same results, agree it's pretty unusual. I was also surprised tonight when replacing the stem with a period-correct one, the the lights on this bike are stamped "W Germany" as well. Seems it saw a few mods or was probably sold in Germany back in the day.