Featured Image on Clay Brick Identification Help, Please

Hello, not sure if this is the correct forum for my question, but couldn't find any more appropriate. I recently picked this relief brick / clay slab at a local secondhand store and while i think it looks very cool, I have no idea what / who it represents or why it's even impressed upon a brick. It's 6 x 6 inches and appears to display a knight or someone with royal status carrying a shield and swinging a sword while riding a flowing horse. I can make out a few letters around the rim (B, C, R, G) and when I ran it through AI, I got a couple different results: 1). Seal of Ulrich III, Count of Württemberg 2). Seal of King Edward I / II, but seems to be a little confused. Any ideas out there as to who person is, why is this imprinted on a large clay slab, and what is the timeframe, please. THANK YOU!!!

 

I think what you're seeing as C is actually an E, BERG, like the seal of Ulrich, if I have this sorted out correctly. What is the object with the yellowed tape on it?

 

If you have the materials to do it, taking a rubbing might be useful.

 

I read Wurtenberg, which could be a variation on Württemberg.
Wurtenberg is also a family name.

 

Thanks! It's an Ulrich medal I found pictured online which I just copied next to the clay tablet for comparison of the rider and letters around the rim.

 

Excellent idea, I will give it a try. Thanks!