Then the obvious thing to do would be to connect a multimeter between the earth terminal and the rest of the assembly.

I don't believe that our overseas manufacturer's are ardent followers of symbols/markings used elsewhere. I reckon it's just generic labeling on a whole batch of boards, some of which are destined for markets whose countries use a cpc and those who don't, a bit like the Chinese Export mark found on most things these days, but it would be interesting see if if one got a continuity reading.

Then the obvious thing to do would be to connect a multimeter between the earth terminal and the rest of the assembly.

I don't believe that our overseas manufacturer's are ardent followers of symbols/markings used elsewhere. I reckon it's just generic labeling on a whole batch of boards, some of which are destined for markets whose countries use a cpc and those who don't, a bit like the Chinese Export mark found on most things these days, but it would be interesting see if if one got a continuity reading.