Hello,
I am a Spanish collector of coins per years. I look for exchanges with others collector, I am in the habit of using the valuation of the catalogue krawse for the changes, but I am opened for any other offer.
I think the first photo is the name Muhammad in a very, very stylized Kufic tile. Here are examples of the same sort of thing. This is often found in Islamic tiles, including in Almoravid Spain.
As for the other side, I'm not sure... Not easy to read.