I'm a little confused; are these actual coins laying on the cover of an auction catalog? Or are they illustrations? What's on the other side of the 1492-1892? Surely not the 1907 obverse shown adjacent? But how do you know it's 20.7 grams? The part we can see has no denomination, so it "might" be a medal. I didn't see anything in the 19th Century Krause that looks like this... And what does "Obsure" have to do with it? Is that on the other side?
