Hi, I have this halfpenny which would appear to be ER I 5th issue. However, the ‘pellets’ on rev show as ‘trefoils’ for which I can find no reference. Coin not in good condition so apologies for pics. The mm appears to have been adulterated.
Anyone any suggestions or comments? All advice gratefully received


Weight 0.29g, 10.3mm diam.
Many thanks
Kevin