WEAR EM SCARE EM DEVIL GORGONS HEAD MASK TUDOR CRISPS ADVERT PENDANT CHARM BADGE
Measures just about 4cm across or so, cast aluminium i think.
Freebie from Tudor Crisps back in the 1970s. I had the hardship of eating a few bags and sending off for this! I seem to recall having a bicycle hat from them too...long gone. Stuck in a drawer for decades, time for a new home!