John Stone wrote:

If there is no indication of a country of origin it might be a privately
issued medal and not actually a coin.

Don't think so. A "piece" featuring Elizabeth II, with the "D. G. REG.
F. D." inscription will usually be a British coin. Those older "crowns"
do not show the face value (25p) either, but are still coins :-) This
one could be KM#925 (Cu-Ni) or 925a (silver) ...

Christian