It's kind of OK if you can't easily read the B in the 16x16. At that size, you just need to see that it's a coin. It doesn't matter so much what's embossed on it, just that there be some detail there because it wouldn't look like a coin if it was a blank smooth circle.
It's slightly wider than tall because the dark perspective under it goes more to the right than down.
I finished and posted the 32x31 and 48x47 versions in the first message. I like the 48 a lot.
How does everyone feel about the B symbol with the two lines through the outside? Can we live with that as our logo?