Fair enough, it does not have a full UK hallmark as if I had bought it in Harrods. But it as 'A' hallmark, as opposed to "not hallmarked, or the hallmark is illegible".

It has a generic EU hallmark, as you will find 90% of high street used jewellery has. Are we saying that most jewellery therefore cannot pass the authenticity check, as most budget High Street jewellery is hallmarked as mine is?

If so, I would say the bar is set way too high. Surely the test that it is genuine gold should be enough? Lets face it, that is what most buyers care about. My own buyer said as much.