This field has been pasture for the past few years, so it was quite nice to get back on it after it had been stirred up.

I've found a fairly similar looking coin, as least as far as the obverse/reverse design goes, on page 65 of Spinks 2020 (listing 601). This coin is half the size though, almost the same as the coin listed as 604 in the photos.
Is my find a later copy?
Thanks very much for having a look.