I paid 5000jpy, approximately $45USD, for these 3 coins at a street market in Tokyo that they hold a couple of times a month. I don't really know what they are, so my questions are so my main questions are:
Are they real, what are they, what are they roughly worth. Of course, my main initial concern is of course are they real. I would normally not risk buying in a market but I figure the chance of being ripped off is less in Japan.
The middle one, I am guessing, is a trade dollar? After getting it home, I did note that some parts, especially the edge have green tarnish/corrosion. I also see black on the rim, so there are black, green, and silver, but I don't see any other colors, like copper. I can take more photos and weigh coins if helpful.
The American silver dollar looks fine to me based on the modern silver dollars I own that I bought from reputable retailers, but I don't really know. I looked up the O and it said that means it was minted in New Orleans. That is all I know.
The last coin, I guess is Russian (or fake Russian?) After getting it home I note that it looks oddly black, and the black did rub off with my thumb, is this artificial aging or ligit? Another suspicious feature is that the lower part of the coin seems to have been worn off, or been cut off, but as there is clear Russian printing around the rim, it surely hasn't been worn down or cut. Maybe it wasn't centered correctly, but that would happen when coins were struct, not cast, and I would guess they were casting at that time?
Magnet wasn't attracted to any of them. I didn't try magnet on a string to test for slight attraction. I think I read that somewhere. If a magnet isn't attracted is the most likely material copper when it isn't silver?
Any tips for the future? I am wondering if I should get a guarantee from the seller in the future. Like, if it is proven not to be silver I can return it. In this particular market, the sellers are regulars and I think they may get their stuff from estate sales.
https://photos.app.goo.gl/Vy9hVKhUsYdNYwct7