It almost looks to me like there might be something wrong with the vertex normals. Did you have to scale the model up at all? I've had troubles in the past with that, when I had to scale it up several thousand times to make it the right size, and all the normals broke. What I ended up having to do was scale the model up in the modelling program, and export that to use in TG.
Just my two cents. I don't know their country of origin, so the coins might actually be worth less than that.
