The original of this is at the other end of Devon from where I live. I first saw the carving on someone else's photograph, and set about carving it from that. After carving the main parts of it, I realised I could not see the details on their photo. So there was nothing for it, but to make the pilgrimage. In fact, I went twice; the first time the place was locked!
This one (from the same place) is a little shallower than the original, but the original of the top carving is much deeper at 19mm 3/4" and much bigger. I thought I was struggling to make the different layers look 3D; now I know why.
You can see that the original is degrading; not surprising after 500 years of passing feet, scuffs, knocks and woodworm. All the more important to learn how it was carved, and re-make it. These carvings are some of my favourite Devon carvings.
I will leave my first attempt how it is, not try to make it any deeper. The original is twice the size. I will carve it again, wider and deeper. The photograph that I carved from did not show it, but in the flesh, it's fairly obvious the background is painted red. So I have painted the ground of my first attempt red, to see how it looks. I like it.