Over the next two days, I didn't do much. I just ride my bike around, regular training, and experimenting on the bracelet I got to see if I could make similar thing.
I learned that the bracelet was just a normal rubber bracelet. As for when it was created, it seems like the way to manufacture this rubber bracelet is different than any other rubber bracelets. So it's possible that someone created it on their own instead of it being a mass-produced bracelet.
So it was not important at all when a rubber bracelet was invented. What's important is that the effect of the bracelet.
I also learned French more and now I could understand more of the effect without G's help in translating. Though I still want a language magic that will make any language out there to be something I can understand.