tdziemia
An additional thought …
With coins like this that are in such poor condition, we need to be careful of pareidolia, in which our brains are biased to see a pattern which may not really be there.
I think the only undeniable feature remaining on this coin are the few letters we can see obverse, and probably a bust
The first letter D (at about 9:00) does not fit very well with a PHILIP, but … G HISP … appears likely, since we know this combination appeared on many coins. The size is about right for a Mexico half real, but I've not found one of these with a left facing bust.
Fully agree here, and after looking at many worn coins, I know that can happen. However, that to say this, Im certain of the shield pattern on the reverse, as the loop lets me see better than I can grasp with the camera lens.
I believe they are called heater shields? With crowns above them. One is definitely upside down (on the left) and one facing up (right). Then the large shield with the large crown at top kind of in the backgroun.
The left facing bust is an issue in general in seems, or maybe it narrows option down.
Thanks for your help. You are much better at this than I, as I dont know how to search using letter combinations as you seem to be doing. Any search tips appreciate, for example, how to search by size when this coin 16.5 one way ad 16.7 another.